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

This hidden collection of everyday objects illustrates life within communist Poland.

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

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

Poland's oldest salt mine has nearly everything one needs to live underground forever.

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

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

An abandoned Jewish sanatorium is tucked within the woods of Poland.

A delightful museum entirely dedicated to the tiny homes of dolls.

The largest toy museum in Poland showcases Europe's history of childhood.

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

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

Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.

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

This grubby wall is said to be one of the Earth's esoteric energy centers.

This bell stars in a tragic love tale and is said to make wishes come true.

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

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

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

This stately bank building hides a spectacular star-studded ceiling.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

Once a black market electronics marketplace, now an otaku shopper's paradise.

A 20-meter (65-foot) robot towers over Tokyo Bay.