One of the largest Buddhist stupas in the world keeps an eye out in every direction.

This religious site features Nepal’s largest statue of Buddha.

Sacred Buddhist home of some spiritual monkeys.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This feat of Brutalist architecture is also known as the Three Sisters.

A museum dedicated to the former country.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Europe's largest dinosaur museum was founded by a passionate autodidact.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

A natural wonder in south Denmark.

Iron Age "bog person" preserved for over 2,300 years.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

The final resting place of one of the brightest physicists of the 20th century.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

This is the oldest Roman-made bridge in the city still existing in its original state.

Breathtaking and huge 430 year old maps of Italy.

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

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

A massive marble foot is tucked away in a small alley near the Pantheon.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.