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.

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

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

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.

An abandoned Byzantine fortress and notorious prison.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Ancient snack bar of the Roman Empire re-opened.

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

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

Where the lovelorn find a home for their sentimental keepsakes.

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

An ancient knight and a symbol of the city's freedom.

This colorful colonial neighborhood in Panjim is one of the only Latin Quarters in Asia.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

One of the world's tallest statues is also one of its most hated.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Moscow's imposing monument to the Space Age.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Immortal combat in a Moscow museum.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.