The scuba diving training facility was named for the steam that rises from the cave's chimney.

North Central Florida's largest flea market and a weekend roadtripper's dream.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

A historic observatory precariously perched at the "Top of Europe."

When waves crash onto this section of beach, the rocks sing a song.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This little-used trail winds through the highest mountain range in central Nevada with sections around 10,000 feet.

This impeccably preserved farmstead is a time capsule of a Pulitzer Prize-winning novelist's life.

An abandoned church gets a second life as a massive beer hall and event space.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

A giant Troll lurks under one of Seattle's oldest bridges.

A tunnel with windows, so you don't miss out on the impressive views.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.