Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

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.