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

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

Large Hadron Collider and the Birthplace of World Wide Web.

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.

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.

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

Structure built from the skulls of vanquished foes.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

One of the best-preserved medieval streets in Europe.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

The world's most active stratovolcano is almost always erupting.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

A sunken idol welcomes parishioners to Davy Jones' Locker.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

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

This medieval Italian town is a sheer (and beautiful) cliffside defense.

Pilgrimage site for star-crossed lovers.

Crushed coral and crystals give the sand its signature coloration.

This centuries-old Italian chapel hangs midway down a sheer cliffside.