 He didn't know these unusual holes would lead him to a mysterious discovery. Old houses can sometimes be full of secrets you'd never expected, whether that be secret rooms or hidden passageways, or sometimes things you never wanted to find in the first place. Sometimes hidden things should remain hidden, and other times you might just stumble onto hidden treasure worth a fortune. Wouldn't you want to know exactly what's going on in your own home? This man certainly did. He found something in his storage unit that captivated the internet, and he captured it all on camera. It all started one day when a man, known only by his YouTube username Cyrex686, started looking around his home. He had always noticed that there were strange markings on the wall, but he had no clue what they meant or why they were there. He asked around his building, and he also asked his friends to take a look at the markings on his wall, but no one had any inkling of what they were. For some strange reason, Cyrex686 couldn't get the markings out of his mind. The markings on his wall were circular, and there was more than just one. There were two smaller ones and one large one. Perhaps large enough for a person to fit into. Strangely, it appeared that something had once been there. Cyrex686 thought that the two smaller circular markings might have been pipes that were filled in. But they weren't filled in well enough to hide their outlines from plain sight. His gut told him that there was something going on behind the wall, but little was expecting what he'd eventually find. After a while, Cyrex686's curiosity got the best of him, and he made a decision that few others would have made in his position. He was going to find out what the markings were, and if there was something behind his wall. And better yet, he decided that he was going to document the entire process and upload the video to YouTube for the entire world to see. But what he would find would only raise more questions than answers. He hadn't noticed or paid much attention to the holes when he first moved in, but now they were taunting him. Unsure of what he would potentially discover, he prepared to film what he was about to do. The holes were sitting there in his house just begging to unveil their secrets. So Cyrex686 decided that he was going to dig deeper and deeper, until he uncovered the real story behind the perplexing markings on his wall. Surprised that he hadn't noticed the closed over circular holes earlier, Cyrex6868 decided to take matters into his own hands and find out just what they were. He knew that he was on the brink of discovering something incredibly interesting. That's when Cyrex686 went to go find his drill, and get to the bottom of the mystery of the strange circles. He started drilling one of the smaller holes first, and he was very surprised at what he immediately found out. Cyrex686 hadn't been expecting to find something so quickly. But after just a short while he curiously found that inside the circle was wood. It was particularly odd as the rest of the wall was made of concrete. This just sparked his interest further. Why had these holes been plugged up? Just by tapping on the holes, Cyrex686 could tell that they were hollow on the inside. That development increasingly made him wonder whether they were just pipes, or if they lead to something bigger and more mysterious. Cyrex686 immediately knew that he had stumbled onto something big and exciting. He ran off to tell one of his friends about the strange discovery. At first, the friend didn't believe him, but then he saw the hole for himself. The two friends banded together determined to find out what the hole led to, and what was behind the wall. They were finally able to extract a wooden plug filling one of the holes and shine a flashlight in the empty space to get a better look. Cyrex686 wasn't able to see much through the small hole in the wall, but he could tell that there certainly was something behind the wall. Hidden. Perhaps for decades. But that begged the question, just why had the space been sealed shut? Perhaps there was a very good reason why the space had been closed up, locked tight away from the rest of the building. But that wasn't about to stop Cyrex686 from going forward and trying to open the larger hole, the one a person could fit through. The building that Cyrex686 was living in was centuries old. It had once been used as an industrial factory. Surely in a building that old, that had been renovated so many times, there were bound to be a few secrets hanging around. Even though Cyrex686 could see through the hole with a flashlight, he still couldn't tell what kind of secret was waiting for him behind the wall. But he was determined to find out, no matter what. Even if it cost him dearly. What cost might there be in opening a hole in the wall of your home you might ask? Well, the place where Cyrex686 was living wasn't exactly a home, it was a storage unit. And also, it wasn't his. He was only renting the place. Cyrex686, assumingly, hadn't asked permission before he started drilling holes in his wall, something that is certainly against his rental agreement with the landlord of the building. If discovered, he would possibly be thrown out of the place. Or even fined. By this point, Cyrex686 had uploaded one video recording of his mysterious discovery, and subsequent dig to YouTube. As the videos started to gain attention, viewers started leaving him comments of warning about his unusual excavation work. Many YouTube commenters wished Cyrex686 luck in getting his security deposit back if he got caught. If the landlord got wind of what was going on in his building, he might be inclined to stop the project, leaving Cyrex686 to forever wonder what was behind the wall of his rented storage unit. But would that be his fate? Luckily for him, the landlord apparently never caught on to what Cyrex686 was doing in his storage unit, despite the drilling and loud banging. And soon enough, the hole was large enough for a person to fit through. However, he never could have expected what he was about to find. Cyrex686 had expected that the circular markings on his wall would turn out to be nothing more than some pipes that were no longer in use and plugged up. But when he looked inside the now massive hole, he received the shock of his life. Cyrex686 was amazed to find that behind the wall was a cavernous room. It was completely pitch black, and even with the help of his flashlight, he could barely see anything. But he knew that he had stumbled onto something big. Unsatisfied by what he could see from the comfort of the inside of his storage unit, he decided to do the unthinkable. He wanted to go into the hole. So, without knowing what was on the other side, he entered the mysterious hole, legs first. Cyrex686's friend had been recording the entire event. After posting the video that showed him drilling the hole, a second video was now uploaded to YouTube, showing him going into the hole. Viewers of the first part had been waiting in suspense until now, speculating as to what might actually be behind the structure. Not knowing what might be behind the wall, and not really being able to see with his flashlight into the dark void, Cyrex686 was talking a risk. A risk with his own light should something dangerous be in the dark passageway. YouTube commenters were very intrigued by the first part of the video, leading them to guess for themselves on what the space might have been used for in the past. Some of the comments seemed fairly reasonable, while others left the public with grand visions of imagination. One of the most popular lines of thought was that the secret chamber had been used to make illicit narcotics. After all, it would be a perfect space for someone to do illegal activities and hide their tracks later on. But that wasn't all. As Cyrex stumbled through the dark chamber with a small flashlight, he hoped that he wouldn't encounter any illegal activities, past, present or future. Commenters also speculated that the room could have been used for as a torture chamber. After all, why else would someone seal off an entire room? Many guesses suggested the mysterious room had been used for something valuable in terms of real estate for the landlord, such as an additional rental space. Incredibly, though, all those guesses would turn out to be incorrect. One of the more far-fetched ideas that the commenters had was that Cyrex 686 had uncovered some type of satanic lair, and possibly, at the same time, was releasing evil spirits or ghosts. But there turned out to be nothing of the sort waiting in the chamber. Finally, Cyrex 686 had made it inside the dark chamber. There was no wind or light inside the room, indicating that it had been sealed off from every side. The room was large enough to fit multiple people. But still there was no indication of what it was used for. Cyrex 686 made his way around the dark room, exploring every nook and cranny. He found a few items that he found peculiar. There was a pipe on the floor, but it wasn't connected to anything. Even more peculiar still, he also found a hook attached to the ceiling. There was no evidence that the room had been used recently. How terrifying would it be to find out someone had been living in the dark chamber, just inches away from your home? But still, there were strange markings on the walls that he just couldn't explain. The markings on the wall were lines, running horizontally up and down the room, on all sides, were lines. Each line was a slightly different color than the last. Was this finally a hint that would finally reveal what the room was used for in the past? By this point, Cyrex 686 was totally stumped about what the purpose of the hidden room. However, he had an abundance of guesses and speculation at his disposal. So he looked to the YouTube comments to see if they could help him figure out what the room had been used for. Another popular theory among the YouTube users was that the room had been used as a secret grow room for marijuana. There were pipes in the ceiling that looked like they could have been used for ventilation before they were closed up. But that theory just didn't hold up. There were no electrical outlets in the room, and still, that didn't explain the odd markings on the wall. Even though Cyrex 686 was finally able to get inside the room, he was still no closer to discovering what the room had been actually used for. The room was largely bare. Apart from a pipe on the floor and a hook on the ceiling, there was no evidence left behind in the room to explain what it had been used for. Much to the chagrin of the YouTube commenters following his progress, there was no evidence of illegal activities. The lack of clues that could point to an ominous purpose for the hidden room only raised more questions and curiosity. Still, Cyrex 686 was intent on figuring out what the room was used for, no matter what. So far, none of the theories had panned out. But one big hint still remained. The strange lines that marked the walls from top to bottom. What were they? Why were they there? This would be the clue that would bust the whole mystery wide open. At first, Cyrex 686 thought that the room might have been used as a storage facility, but that didn't make sense. And that's when it dawned on him. He had finally figured out what the strange lines on the walls were from. The strange lines on the walls were actually markings made by liquid. They were all over the wall to indicate the changing levels of the liquid over time. He thought that the secret room had possibly been used for sewage. That would certainly explain the reason that there were no entrance points into the room if it had been used as a storage tank for liquid. But that wasn't exactly the real answer. The secret room behind the hole had actually been used for something else completely. With the help of some friendly YouTube comments, Cyrex 686 learned that the secret room was actually most likely a cistern, a tank used to hold water, used when the building was an industrial factory over 100 years ago. Cisterns were widely used before the time that man invented indoor plumbing. The cistern would collect rainwater and store it in a tank for later use. The strange markings on the walls inside the secret room were actually from water levels rising and falling. But why had it been mysteriously sealed off? The cistern could be put back into use, but modern technology rendered it essentially useless. Many people commented that in older buildings, especially industrial ones, things like cisterns can be found. As they are no longer needed they are simply closed. The cost of removing the cistern would have been much larger than just closing it off. Cyrex 686 was also lucky that the pipes that he uncovered weren't filled with liquid sewage or something equally as disgusting and dangerous. Had the cistern had a leak, it then could have flooded the entire place with aged dirty rainwater into. So now what would he do? Even though many people who followed the suspenseful developments were amazed and inspired to search their own houses for secret rooms, there were of course, the naysayers who criticized what Cyrex 686 had done to his residence. But why? Many of the YouTube commenters criticized what Cyrex 686 did because he had made a huge hole in the wall of his residence without permission. Many people couldn't believe that his actions weren't initially discovered. Still no one could have guessed what his landlord would eventually do. It might amaze you to hear, but Cyrex 686 actually did receive his security deposit back from the landlord. Or at least he claimed as such in a YouTube comment. As it turned out, his landlord didn't mind the holes at all. In fact, the landlord was probably just as interested to find out what was behind the wall as his tenant was. Maybe now he can do something with the room, like renovate it or lease it out as another storage space. But Cyrex 686's story doesn't end there. The videos of his exploration of the mysterious holes have gained millions of views since they were first uploaded in 2011. Cyrex 686 has since moved out of the storage unit into a house. His curiosity was still as strong as ever, and he decided to explore the new house for any possible hidden secret stored away through the ages. What are the chances that he would make two amazing finds in his lifetime though? If you think that surely there aren't many houses that have hidden secrets like the water cistern in the industrial building, then you're in for a surprise. Cyrex 686 ended up finding a secret door in his new house. It had long been painted over and was stuck shut. But as we all know, nothing was going to stop him from getting that door open and finding out what was inside. Surely he was hoping this time to finally find some valuables, but that wasn't the case. After finally prying the door open, inside there was a number of paint cans. The room had been used as a storage area long ago. Cyrex 686 hasn't been the only one to find amazing hidden discoveries in his home. A man in Turkey was renovating his house, which required him to knock down a wall in the basement when he found something changed history. What started off as just a tunnel, became much more and surprised historians everywhere. It turned out that he had uncovered something thousands of years old, and the location quickly became a national treasure. It's even a museum now. So check it out here.