This semi-secret storybook hedge maze is also the oldest garden in the city.

Mountain where Jesus was first tempted by the Devil.

This cemetery features modernist statues as strange as its name.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

Turntable anonymously received orphans, alms, and groceries.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

Open air sculptures by an eccentric and loin-clothed hermit.

The oldest Roman lighthouse still in use.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

This abandoned naval battery stood at the ready as recently as the 1980s.

The remains of an encyclopedic sculpture garden later used as an internment camp.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

A 12th century church completely covered in shells.

Seaside ruins of a settlement that date back to the first century B.C.

Christ's blood preserved in a Belgian town.

Climb inside an iron crystal magnified 165 billion times its normal size.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.