One of the oldest and certainly best preserved Cistercian abbeys still in existence.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A modern English garden of eccentric beasts, follies, and oddities.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Go inside to really appreciate this 500-year-old technological masterpiece.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

An ancient Egyptian temple in the middle of Madrid, Spain.

Five candy-colored villages on the Italian Riviera.

This doorless 20th-century elevator doesn't stop or slow down.

The heads of two giant mythological water horses honor Scotland's horselord past.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.