A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

A fascinating insight into daily life in the Eastern Bloc.

Historic medieval fortified city in southwest France.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

A decommissioned submarine base makes a great space for graffiti art.

Man-made mineral caves house massive bat colony.

A former imperial sea-fortress and Soviet prison.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

In the foothills of the lesser Caucasus, a centuries-old fortress still stands.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

Former island in the Aral Sea used to be a top-secret Russian bio-weapons facility.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

Yugoslavia's biggest underground airport lies in ruins.