This abandoned orphanage-turned-asylum witnessed a terrible chapter in Québec's history.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

The largest open-air contemporary art center in Latin America is a unique experience in the Atlantic Forest.

Jacksonville's highways rendered this century-old grammar school unusable.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Perhaps the most unique of any Frank Gehry design for one simple reason: Gehry himself actually lives here.

Megachurch turned Catholic church comprised of 10,000 glass panes.

An ultra-modern vista that has been featured in so many films the house is a celebrity in its own right.

A deserted hodgepodge of experimental structures designed by nearby university students.

The darkest building on Earth was built for the snow-white scenery of the 2018 Winter Olympics.

Twisted buildings adorn the banks of the Rhine river.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

66,000 pieces of art, donated by one of the world's richest men.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

20,000 pieces in a Frank Gehry-designed building.

An unusual house built using an iso-elastic membrane.

A medieval village holds a very modern hotel.

This sublime architectural marvel is a rare example of an expressionist church.

China’s breathtaking futuristic library is lined floor to ceiling with fake books.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

Norway has built what may be the world's most beautiful public toilet.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.