A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

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

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

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.

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

Large Hadron Collider and the Birthplace of World Wide Web.

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

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

These spooky and unusual stone formations create an underworldly landscape.

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

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

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

This aquarium has almost as many world records as it does fish.

This temple located on a vertical drop of a rocky mountain houses relics from the Song Dynasty.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

The embalmed remains of the communist leader lie within a custom crystal coffin.

This Cold War–era underground city includes offices for Mao Zedong and Lin Biao.

Natives of this mud-brick desert village use an ancient irrigation system to grow sweet, seedless grapes.

This weekly market in the remote oasis city of Hotan still has the atmosphere of the old Silk Road.

China's biggest e-waste village.