 SCP-636 is a maintenance elevator at the Red Hotel. Unlike the other elevators in the building, SCP-636 contains a magnetic card reader, which, when used with a specific card key, will cause the elevator to move to a third sub-basement beneath the building. According to the building plan, there are only two sub-basements beneath the building, and the owner of the property was not aware of an elevator with magnetic card access. Whenever any individual attempts to access this floor via SCP-636, the elevator appears to work normally. However, upon reaching this non-existent floor, all contents of the elevator, including any personnel or remote monitoring equipment, will disappear.