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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

This unusual subway stop was originally a real estate office.

A modern zoetrope on the New York City subway.

This innocent-looking townhome is actually a subway exit.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

This abandoned subway station can still be seen on regular commuter trips.

During the holidays, a vintage subway train whisks New Yorkers back in time.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

A boiling wellspring flowing with natural gas burns in a continual blaze.

A toxic ghost town sitting atop a massive coal fire.

A natural gas leak provides a flickering flame beneath a waterfall.

A coal fire has been burning underground here since 1896.

Flames have been burning within this mountain for more than 2,500 years.

A shrine of fire worship built on top of a natural flame.

6000-year-old coal fire moves one meter per year.

Mysterious hillside with a continuously burning natural fire.

One of the world's richest men bought this former paper factory and transformed it into a mall.

A former zoo turned public park, where visitors can hang out in the old animal cages.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

You can row a boat through this ancient underground reservoir.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.