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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Dedicated to a synagogue that was destroyed after having survived World War II.

Often mistaken as a medieval Gothic monument, this unique cornerstone only dates back to the 1980s.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

A sculpture of the beloved author surrounded by characters from his fairy tales.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

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

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.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

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

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

Atop this library is one of the most beautiful green spaces in Warsaw.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

A small granite monument marks where the borders of three countries meet.

This extensive collection covers thousands of years of Polish military history.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This 13th century Gothic brick castle is the largest in the world by surface area.

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

A statue honors the children who fought Nazis in Poland.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

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