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

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

The notorious headquarters of a corrupt political machine.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Once a year, at exactly 11:11 a.m., this monument comes to life.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This former fascist summer camp was abandoned for decades.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This sanguine boulevard was named after a deadly cowboy bar fight.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

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

A controversial memorial at the place where Captain Cook met his violent end.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.