This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

The site of a legendary battle immortalized in medieval literature.

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

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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.

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

An early 20th-century bullring converted into a modern shopping center.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

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

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