England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.

This sign designates the road that leads to the infamous Area 51.

An eatery for UFO seekers on the Extraterrestrial Highway.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

A giant open-air sculpture made of over 200 full-sized boats.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A 1930s Art Deco swimming pool with a design inspired by grand ocean liners.

This historic abandoned train station looks like a stop for ghost trains.

The largest greenhouse in the world is home to over one million types of plants.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Mountain where Jesus was first tempted by the Devil.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Try not to get slimed in Tribeca.