The only theatre in the world constructed specifically for sound movement.

A 140-year-old castle with underground caves hidden in San Francisco.

Lucha Libre (Mexican Wrestling) themed taco shop.

A couple turned their front yard into an artistic masterpiece.

The classic Atari game's iconic aliens have invaded downtown San Diego.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

One of the largest trees of its kind in California.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This historic sunny-yellow building has an unfortunate connection to the sinking of the Titanic.

Artisans have been gathering in North Carolina since 1989 to show off whimsical takes on an everyday item.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This woodland architectural installation acts as a camera obscura for the heavens.

Home of an evil witch famous within southern folklore.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The secret city built by the Manhattan Project.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

Known locally as "the giant head," this 14-foot LED sculpture has a photo booth in the neck where you can have a 3D picture taken and displayed.

There are two legends behind the origin of this unusually tall sanitary structure.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

For just a few hours each morning, this market serves specialties from the city's shrinking Chinese-Indian community.

A 2,000-ton rock resting in a state of a delicate balance.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.