This Florida sinkhole hides a rainforest-like micro-environment in its depths.

This little museum in the town where zombies were born celebrates the living dead.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

A museum within a museum, devoted to history's most questionable medical devices.

The unbelievably opulent home built for an infamous newspaperman.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The abandoned personal amusement park of the King of Pop.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The eccentric mansion of one of the most popular horror authors of modern times.

An extraordinary mixture of natural beauty and man-made phenomena.

Tour the sci-fi-esque reality of governmental disease management.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This Los Angeles animation studio is keeping the wonder of stop motion puppetry alive.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.