The Lund University's former gym houses a museum focusing on the creative process of art.

Over the course of its history, this tiny island has held enslaved people in transit and served as a quarantine zone. Today, it's a giant tortoise sanctuary.

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

This large, circular tomb is the final resting place of the first emperor of Rome.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Breathtaking and huge 430 year old maps of Italy.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A slice of central Asia in the middle of Berlin.

A quaint Russian village in the middle of a German metropolis.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

The "Prussian Versailles" that is as glorious today as when it was built.

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

A surreal museum of extraordinary industrial objects.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.