In northeastern Poland, the ruins of a massive granary overlook the Narew River.

A naturally mummified 2,000-year-old man.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

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

Hundreds of notes give thanks to the patron saint of lost causes.

On this Polish road, an optical illusion makes cars seem to roll uphill.

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

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

This antique thermometer honors the creator of the first universal temperature scale.

This towering statue of Jesus provided internet to the surrounding area.

One of the world's largest collections of medieval religious art.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

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

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

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This fairytale medieval church in Poland originally spent centuries in Norway.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.