Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

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

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

This former insane asylum now holds a pathological anatomy museum.

Handsomely crafted representations of our round planet.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

The most visited, and possibly most controversial, museum in Germany.

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Monument to a suicide protesting the Soviet invasion.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

Walk through Czech history in Prague's largest graveyard.

Macabre astrological automaton clock dating to the late 1400s.

Sofia's legislative center is continuously reinventing itself.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A collection of miniature, symbolic sculptures hides in plain sight across Kyiv.

This oddly shaped building is a surprising Soviet-era crematorium.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

Sculpture that doubles as a time capsule so that life can survive radiation outside Chernobyl.