This often-overlooked monument was crafted in the shape of the iconic samurai coin to honor an Edo-period mint.

It's bad manners to eat and drink on the subways of Tokyo, unless the train is this bar. 

Morocco's Argania trees are infested with nut-hungry goats.

A brutalist gem towering over the heart of Milan.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

A lush indoor jungle fills this bustling Madrid transportation hub.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The largest underground church in Europe.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

This ancient structure is widely thought to be the oldest intact pyramid in the world.

One of the most well-preserved temples of ancient Egypt.