The largest portal tomb in Europe has a capstone weighing around 150 tons.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

One of the shortest streets in York has an especially odd name.

The abstract sandstone rock formations at this Algerian national park are rich with prehistoric art.

This disused Cold War bunker has been restored to all of its early 60s glory.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

"There's nothing there," and other lies the KGB told us.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

An abandoned brutalist monument whose history has been lost to the ages.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

Oriental bazaar in the heart of Sarajevo.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

These warring psychedelic crags commemorate an unsuccessful military operation.

Bridge that died in war and was resurected.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

This bazaar is one of the oldest in the Arabian world.

The world's most remote airport.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The largest stone moai on Rapa Nui.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

A bright little alley in La Boca is a part of tango history.