Sacred Buddhist home of some spiritual monkeys.

Ancient serpentine sacrifice holder that has stood the test of time.

Sofia's legislative center is continuously reinventing itself.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Romania's triumphal arch looks out over Bucharest.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

An icy lake tucked among jaw-dropping alpine panoramas.

This massive blockhead sculpture hides an entire library.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The largest catacomb system in the world.

Padlocks cover this rickety footbridge with love.

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

An underground city of salt.

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

A statue honors the children who fought Nazis in Poland.

This Ukraine alleyway has become its own little island of forgotten things.

The last planned Soviet city was built for the former residents of Pripyat after the Chernobyl disaster.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chernobyl disaster.

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