An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A historic freight system that found the true gold rush is in tourism.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

World War II bunker still standing on the New Jersey beach.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

Step inside Lucy, the world's largest "elephant."

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The site of a classic series of Laurel and Hardy pratfalls.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

An abstract monument to a symphonic composer.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Soaring over the Niagara Whirlpool since 1916.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A walk through the historic city center, under the streets of Seattle.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

Launchpad for the US military’s dead mouse operation to battle millions of snakes.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.