This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Standing stones found on a construction site are re-erected.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

A rare example of a German cemetery with traditional grave markers dating back several generations.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Op-art architecture designed for happiness.

Bizarrely-painted church designed by a controversial artist.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Double spiral staircases are not unheard of, but they are very rare.

This one-time health resort was used by aristocrats around the world.

Where the lovelorn find a home for their sentimental keepsakes.

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

A wonderfully strange collection of 500+ stuffed frogs doing people things.

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

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

An idyllic traditional timber village on a picturesque hill was built for a film.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.