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

Along a California highway is a kind of Jurassic Park made of metal.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Secret Swing.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Lost subway station nestled beneath Toronto's busy commuter line.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

A collection of beautiful crystals shaped like freshly plucked roses.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

An overgrown garden stands as a grim marker of an unrealized dream.

The morbid items in this small and hidden museum are not for the weak stomached.

The largest catacomb system in the world.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

England's only square-dimension hill horse was built to celebrate Queen Victoria's coronation.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

At the United Kingdom's only residential library you can sleep among the books.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

The final resting place of the world's first nuclear reactor.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.