Its collection includes a broad array of social, geographic, graphic design, and political history.

Europe's first floating restaurant is home to a hilarious legend.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This unattributed sculpture in Amsterdam is hiding in plain sight.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

A restaurant and observation deck built in a unique broadcasting antenna.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Where once there was a train station bathroom, there is now this German burger joint.

This monumental work of art symbolizes the coming together of a previously divided city.

One of downtown Berlin's last reminders of its Communist past.

The most visited, and possibly most controversial, museum in Germany.

Reminders of the Battle of Berlin still scar the railway.

Celebrating the works of a beloved Italian actor, known for such cult films as 'They Call Me Trinity' and 'Watch Out, We’re Mad!'

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

Cold war icon and onetime "hole" in the iron curtain.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Iconic red and white plaques show the creative names invented to navigate the city streets.

A cenote sitting in the middle of a parking lot shows the Yucatán Peninsula at its most urbanized.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

This sprawling bookstore spans four floors and has more than a million books in stock.