Underneath this small church are 15,000 bones, arranged by an obsessive academic.

The first modernist church in Europe.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This small shrine is dedicated to the designer of the first Russian fighter jet and his brother, who became Chairman of the Presidium of the Supreme Soviet.

Armenia's premier center of astrophysical research was established during the Soviet era.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

The luxurious circular mansion built for a Communist leader now lies abandoned.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

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

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Hamburgers are intensely proud of their tunnel beneath the river.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

An old department store turned Nazi prison turned artist commune.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.