An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

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

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

Large Hadron Collider and the Birthplace of World Wide Web.

The steepest classic funicular in the world glides along a dizzying incline.

A historic observatory precariously perched at the "Top of Europe."

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

These spooky and unusual stone formations create an underworldly landscape.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Caves famous for the dragon-slaying saint who lived there.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

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

A little-known castle set in a nature reserve.

This ancient abbey now lies in majestic ruin behind a caravan park.

These precariously placed ruins harken back to a 13th-century castle.

This ancient castle has been abandoned since the Edwardian conquest of Wales.

Go deep down into the earth to experience the world of Welsh coal miners.