This 1967 experiment in modular architecture was designed to be a new model for urban living.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

World's first "penitentiary," meant to be humane, drove men insane.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Celebrating the Eucharist, the day is a legal holiday in many parts of Germany.

A graveyard and memorial chapel for victims of leprosy.

A Nazi concentration camp and Anne Frank's place of death.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The stones of this formerly witch-obsessed castle were used to build a church.

In this truly magical place, rent hasn't been raised since the year 1520.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

A quaint Russian village in the middle of a German metropolis.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

The "Prussian Versailles" that is as glorious today as when it was built.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

"The most colorful grottoes of the world.

A small but immensely extravagant palace built by the "Night King."

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

The fairy tale castle of the "fairy-tale king."