Largest Roman Catholic church in North America.

The national park was once a plantation estate.

Home to items never before seen by the public.

The majority of the highest mountain in Poland is actually located in a different country.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

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

Gliwice Radio Tower, likely the tallest wooden structure in the world.

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

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

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

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

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

The coffin-shaped church was once home to monks who slept in coffins.

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

This Communist-era residential block is one of the longest residential building in Europe.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

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

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.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

A national collection of Communist-era musical posters.

These massive moving sand dunes have swallowed an entire village and are still on the run.

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