Rainbow-hued in the summer and crystalline in the winter, this salty lake has inspired battles, temples, and plenty of awe.

This terrifying glass bridge on the side of a mountain cracks as you step on it.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

This abandoned fishing settlement may well be the greenest village in the world.

A pub that is literally in the middle of nowhere, but continues to do business.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

This location of a Mexican chain restaurant has a unique location: an old jail.

This old wooden funicular railway leads to a cemetery in the forest.

This outdoor library provides around-the-clock access to around 7,000 books.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Ruins of a German Castle on top of a towering stone pillar.

Started as a kitchen garden, now the second largest botanical garden in the world.

A sulfuric hellscape in southern Italy.

A young Italian couple has been locked in an embrace for over 6,000 years.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This Italian foot path winds through the mountains via 52 individual tunnels.

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

This abandoned Brutalist treehouse is a hidden architectural relic.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.