Europe's simulation of the Martian surface uses soil from Mount Vesuvius.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Explore the subjective dream of a hotel.

A perfectly preserved example of a fortified Medieval ricetto.

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

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

The highest waterfall in Italy is only "turned on" five times a year.

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

Hundreds of plague victims were buried beneath this small, rural church.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

A medieval fresco which reminds visitors that death will come for us all.

This museum is home to 22 panes depicting skeletons dressed in colorful garments.

Jesus turns into vines inside this chapel.

This church, better known for its weeping portrait of the Virgin Mary, also houses the world's oldest existing piece of taxidermy.

Distressing images of the Last Judgement adorn the walls of this medieval sanctuary.

Statues portraying anatomical deformities were placed in this garden to foster ethical behavior.

Acrosticism and palindromes on this randomly placed stone.

Musings of an artist carved into a rural stonewall.

This Italian pyramid is said to hold the mingled remains of the dead from both sides of the Battle of Novara.

Legend has it that the devil itself built this portal on a dare.

Natural cathedral designed by Italian artist Giuliano Mauri.

A genius of the art of juggling is buried here.

A museum entirely dedicated to Bergamo’s tradition of puppetry.

Beautifully decorated tarot cards from the Middle Ages.