This historic stone bridge has an entire neighborhood clinging to its sides.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

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

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

This former steel and coal plant is now a neon-lit industrial fantasia.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

This attraction was abandoned after the Chernobyl disaster.

This derelict superstructure was a very important warning system for the Soviet military.

The last bastion of Roman presence north of the Alps looms over a German town.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

This stunning limestone waterfall is the highest in Estonia.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

Each of these hand-painted wooden boxes, which date to between the 16th and 19th centuries, contains a genuine human skull.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

If they push on just the right spot, even the weakest person can move this titanic boulder.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.