These naturally balancing rocks were pictured on every Zimbabwean banknote, up to the 100 trillion-dollar note.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

An ancient necropolis of magnificent tombs.

The early American colonists were such ferocious drinkers the law actually required every town to have a tavern.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Natural time capsule containing an alien ecosystem.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Five acres of divinely inspired folk art.

Where the Great Wall of China meets the sea.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

A little-known hot spring haven right below the highway.

The writing studio of an American adventure author, built in the style of a medieval castle.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

In the town of Åtvidaberg, the midday sun sets off a loud cannon boom.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.