A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

This 47-story "M" needed 20 years to be completed

Vibrant street art created with mixed media.

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

Rare karst landscape eroded from a flat seabed.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

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.

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

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

Too much gossip or just missing curfew could land you in here for a couple of days.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

This Transylvanian church has changed its denomination four times.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

One of the most controversial statues in Romania is an emperor with no clothes.