A complex series of tunnels runs beneath Walt Disney World.

Walt Disney was concerned when seeing a Frontierland cowboy walking through Tomorrowland. Unimpressed by this breaking of the 4th wall, Disney recognized there needs to be a way to keep certain things out of sight from the general public. Thus, underground tunnels were added to Disney World. That way trash and utilities can be hidden and costumed performers can move around outside of public view when they are not on duty. 

This massive tunnel system contains corridors that are 15 feet high and wide enough for delivery trucks to drive through. There are also locker rooms, maintenance rooms, cafeterias, and a fire prevention center. There are 28 hidden stairwells to get to the tunnel system. Children under 16 are not allowed in, so as not to spoil the magic of their Disney World experience. 

Read all about the Disney Tunnel System, including where the entrances are!