Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

A public fountain that spouts "health water" from a nearby spring.

Shakespeare has been brought to life in this open air theater for the better part of a century.

An iconic 1960s theater with a Buckminster Fuller-style geodesic dome.

Back in the day everyone who was anyone played this historic western theater.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

Elaborate tile work in this railway station tells the story of Portugal.

The stunning interior of this Gothic church is covered in ornate gold details.

One man's remarkable private collection of art from around the world.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A mosaic map made of over 100,000 tiles depicts the geological features and sea creatures that live along this San Diego beachside community.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

The former house of an anthropologist couple displays Lacandón Maya artifacts in a homey atmosphere.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.