In the middle of a busy residential neighborhood, a small roofless church being reclaimed by nature.

A newspaper editor turned this abandoned island into a tortoise nature preserve that's now the world's smallest national park.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This abandoned Belgian fortress is purposefully being left to nature.

This ghost town in Belgium will lose its street art when it ceases to exist.

The Devil’s own choice when he needs a drink in Brussels.

One of the deepest indoor swimming pools in the world.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

This bike path was sunk below water level for maximum wonder.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

A beautiful maze marks where three countries meet.

A beautifully eclectic mix of architectural styles.

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