disneyfanatic.com

p81xN TIL there are large tunnels called Utilidors running under the Magic Kingdom at Disney World. The Utilidors allow employees to perform services like trash removal and for characters to travel around the park without being seen.
OxB4 TIL the Cinderella Castle (189 ft) and Tower of Terror (199 ft) at Disney World (Orlando, FL, USA) are intentionally under 200 feet (61 m) tall to avoid regulations that would require it to have flashing aircraft warning lights at the top.