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

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

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

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

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

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

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

A collection of old neon signs from all over Poland line a secluded courtyard.

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

An underground city of salt.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Flamboyant architecture from the turn of 20th century.

A historic scientific breakthrough that crosses nine borders.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Ferdinand Magellan dubbed the world's largest water village the "Venice of the East."

A symbol of Islam in oil-rich Brunei.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

The highway's southernmost spot is a beloved local attraction.

"We Seceded Where Others Failed."

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

A building so large that it has its own weather.