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

Is this statue at Naumberg Cathedral the fairest of them all?

An alchemist's "magic door" stands in the middle of a Roman park.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.

The remains of one of Wales’ great medieval buildings, with a pub in the cellar.

A towering monument to war, located on a beautifully peaceful hill.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A magnificent collection of imperial armor and weaponry.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Visiting this café is like visiting the Austrian grandma you wish you had.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

Visit a secretive crypt before it crumbles to dust.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

A memorial to the beloved brown bear that served in the Polish army during World War II.

A crucified and bearded female saint.

The world's largest boar is a huge steel titan found at a French rest stop.

Explore an eerie, abandoned medieval citadel.

The evocative ruins of a medieval village.

This small Japanese street is lined with figures, sculptures and a shrine dedicated to frogs.