Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

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

Elaborate tile work in this railway station tells the story of Portugal.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Balconies that have a most unusual accent.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This massive blockhead sculpture hides an entire library.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

Special benches that play Chopin's music are scattered throughout his native city.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A striking public sculpture representing the period of martial law in Communist Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.