Rebuilt remains of a temple to Roman god Mithras.

A prehistoric rock shelter that's literally in someone's backyard.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

It's easy to forget what century it is as you wander this rustic homestead.

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

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The remains of an early 1900s dude ranch that operated until the 1970s.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

You don't have to be an ambassador to dine like one.

The tallest city hall in the world offers an excellent bento box.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

This 2,000-year-old tree inspired the nursery rhyme "Rock-a-bye Baby."

This poignant WWI memorial looks like a lighthouse 100 miles from the sea.

This lovely ancestral home inspired the author D.H. Lawrence, and features a tunnel made out of a living willow.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

Seat of the Duke and Duchess of Devonshire for centuries.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.