A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

This remote research station sits amid the second-largest ice sheet on the planet.

An abandoned outdoor movie theater in the Sinai desert.

The tower claims to be the world's only pagoda made entirely from Myanmar's lucrative gemstone.

Russia's giant concrete QWERTY keyboard is likely the largest in the world.

This Seattle joint serves food inside an old train car once used by FDR.

Locals transformed this Canadian evergreen into a secret hangout with spectacular views of Vancouver's skyline.

All aboard the world's longest miniature railway.

People have been scribbling on this massive chunk of granite for more than 1,500 years.

One of the largest sand dunes in the world is nicknamed the "Scary Mountain" due to its steep slope and sharp incline.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

Crawl through the hole in the middle of this stone to break off a bad relationship or initiate a good one.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

A vintage video game wonderland in downtown Reykjavik.

The largest radio telescope in the world searches for extraterrestrial life from the remote limestone peaks of southern China.

A (slightly) grownup take on the classic retro arcade.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

The Arctic Circle runs through this isolated spot north of Iceland.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.