Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

The location of this historic castle was inspired by a donkey.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Legend says this rock was once a chopping block for public executions.

It's said this was once the home of King James V's pet lion.

A distinctive building that incorporates a mythical beast into its architecture.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

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

Of course Salvador Dalí lived in a castle...

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A huge cathedral single-handedly constructed by one eccentric monk.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

An abandoned airport in the middle of nowhere.

A small town celebrates its cash crop with a giant highway sculpture.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.