19th century pendulum and a clock restored by a rogue group of guerilla artists.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A painfully obvious spy house sits right across the street from the Russian Embassy.

After sitting abandoned for decades, this historic mine is now the only publicly accessible chalk room and pillar mine in North America.

This erect, phallic geological spire wasn't always named so domestically.

Roaming bison and a spectacular view at the highest point in Nebraska.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

One of the deepest indoor swimming pools in the world.

A 1930s Art Deco swimming pool with a design inspired by grand ocean liners.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This scenic waterfront swimming pool is the longest salt water pool in North America.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

Visitors dip into a variety of pools of what was once ice.

Every summer, an open-air swimming pool appears at the base of a Finnish city's beloved winter attraction.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

The Grand Canyon of Texas.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

The cliff and rock formations are made out of Sioux Quartzite.