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

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

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

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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

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

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

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

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

Naturally formed rock city in Poland.

The site of the first battle of World War II.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

An underground city of salt.

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

This mysterious cliffside carving of an ancient Hittite deity has baffled scholars for centuries.

This shuttered power plant is now Turkey's first industrial archaeology museum.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

Fantastic lake on the heart of a fault line.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

A sacred lake with thousands of sacred carp and a biblical history.

The most metal church of all time was built in record time because of an international, pious pissing contest.

Mausoleum and Holy Seat of Antiochus I of Commagene.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.