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

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

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

The first, and perhaps only, monument dedicated to Wikipedia.

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

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

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

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A monument to Poland's famous alleged UFO abduction case.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

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

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.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

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

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

The silly symbol for an underground protest group is now scattered around the city.

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

A haunting deserted hotel is a favorite with artists and photographers.

The site of one of the largest prison escapes of World War II.

The last original stone marking the interwar border between Germany and Poland sits in this unassuming village park.

These traffic lights celebrate the 100 year anniversary of the women's suffrage movement in Lithuania.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.