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

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.

Boats must transform into railroad cars to navigate this Polish canal.

Naturally formed rock city in Poland.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Real bones which are said to have belonged to a Polish dragon.

A cluster of headless, armless sculptures looms within a popular Polish park.

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

An impressive monument to Poland's independence.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

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

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

An underground city of salt.

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

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

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

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

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

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

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

Modern art commemorates one of the first military actions of World War II.

A huge wooden clock that is so beautiful its creator was forcibly blinded.