The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.

This former sugarcane transport tunnel is now a portal to a lovely beach.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

The world's second largest single-dish radio telescope, once used to contact E.T.

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

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.

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

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.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

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

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This postmodern apartment block was designed to be a vertical neighborhood.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

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

A once-secret library of Freemason history in Catalonia.