Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

The largest fountain in Bratislava.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

A once-fairy tale mansion now stands in a state of disrepair.

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

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

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

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

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

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

A pair of connected skyscrapers form this symbolic gateway.

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

This colorful statue welcomes visitors to a Barcelona park.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

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.

What might look like a cliffside sacrificial altar at first glance is actually a stone compass pointing to cities and lighthouses all around the world.

Mysterious man-made rock piles form an ancient cemetery on this rocky beach in Norway.

Norway's national monument to fallen seamen.