This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A downtown park built on top of unclaimed graves.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

These markers are used to document elevation changes around the famed dam.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A lonely Gondola stuck on a traffic circle sits in a spot where it once would have floated down the Grand Canal.

A treasure hunter's tiny bar, harboring celebrities since 1959.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

This well-traveled chess park offers scenic views of the pacific and a colorful, eclectic clientele.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A second generation sun-powered marvel lights up the night.

An offbeat angle on the ocean viewed through an antiquated lens.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

In one Santa Monica parking lot a mushroom cloud made of chains heralds a message of peace.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

Every equinox this Maya pyramid puts on a spooky ancient light show.