St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An underground city of salt.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

An ancient necropolis of magnificent tombs.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

Controversial site of what could be Europe's first pyramid.

Oriental bazaar in the heart of Sarajevo.

The place where World War I began.

A field filled with carved medieval tombstones called stećak.

Bridge that died in war and was resurected.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

340-foot statue built to honour the Heroes of the Soviet Union.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This attraction was abandoned after the Chornobyl disaster.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A small part of Russia that does not touch any other part of Russia.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.