Padlocks cover this rickety footbridge with love.

A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

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

There is a mouldering Jewish cemetery hidden away in the capital of Moldova.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

An old department store turned Nazi prison turned artist commune.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A huge cathedral single-handedly constructed by one eccentric monk.