A 16th-century Andalusian palace.

This lucky bronze frog was gifted to Madrid by a casino.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

Abandoned Nazi train station turned underground astroparticle laboratory.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

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

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

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

This free, take-a-book shop seems like a trick but isn't.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A failed piece of Orientalism has become the proud symbol of a community.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.