Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

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

An architect transformed this abandoned cement factory into his castle-like workshop.

A breathtaking viewing platform over the Alps.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Mysterious heaps of stones dot these otherworldly woods.

Enormous sandstone towers loom within a Czech forest.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

The fountain marks the area where hundreds of accused witches were burned at the stake.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

This riverside restaurant has been serving customers since 1146.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

340-foot statue built to honour the Heroes of the Soviet Union.

The hidden lair of an alchemist rediscovered in a 2002 flood.