One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Erotic art covers the walls of the largest ancient pleasure palace.

Pilgrimage site for star-crossed lovers.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A series of playful yellow penguins share a serious message about the environment.

Monument to a suicide protesting the Soviet invasion.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Looming communist pillar with a Czech twist.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

Britain's only herd of free-ranging reindeer.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

A sculpture of a salmon swimming through a brick building.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

The magic's in the hole!

An extraordinary mixture of natural beauty and man-made phenomena.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.