A dead saint, a deadly poison, and a mysterious holy ooze.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

See how paper is made the old-fashioned way.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

Something's watching you.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This once-derelict building is now one of the most beautiful bookstores in the world.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Reminders of the Battle of Berlin still scar the railway.

Celebrating the works of a beloved Italian actor, known for such cult films as 'They Call Me Trinity' and 'Watch Out, We’re Mad!'

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

With over 10,000 lights, this engineering marvel lights up the city after dark.

Georgia's answer to Easter Island immortalizes the nation's great poets, artists, and leaders in stone glory.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.