Some of the greatest minds in the history of Hungarian art and science converged in this café.

This airport currywurst stand is made out of retro airplane parts.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

Traditional 11th-century outdoor tannery.

A sulfuric martian landscape that looks far better than it smells.

This black church sits alone among a field of lava rock.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

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

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

This elegant arc of a waterfall marks a religious turning point.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This abandoned prison castle has become an imposing gallery of graffiti art.

The crumbling remains of the first Black-owned and operated hospital in Kansas City.

An abandoned concrete jungle surrounded by a lush park.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An unusual round church in London with a Templar past.

Banksy gives themself artistic license with this piece of London street art.