 SCP-413 is a four-story parking garage. SCP-413 is able to change its internal structure, such as moving ramps, adding floors, changing staircases, and so on. However, when observed from the outside, there is no indication of any of these changes taking place. While accurate measurement of SCP-413's interior has proven impossible, it is well established that the interior is larger than the building's external dimensions, and that the interior dimensions are constantly changing. Another effect SCP-413 appears to have is to interfere with an individual's sense of direction. Analysis of recordings taken of the interior reveal that SCP-413 generates a low-frequency sound within its interior that shuts down or interferes with several key regions of the human brain, controlling navigation, balance, and short-term memory.