Hundreds of hidden passageways weave through the old quarters of Lyon.

A castle perched precariously over the Crimean Sea.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

The snowbirds here are circus sideshow performers.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

An icon among Florida's pre-Disney tourist attractions.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

A haunted hill that supposedly defied gravity.