This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

A Christian monastery stands on what was once a holy Incan temple.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A fascinating little museum all about the rich history of Peru’s famous plant.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.

This stone complex marks the urban center of a lost civilization.

Now containing the bones of the actual conquistador, instead of someone else.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

An astounding collection of taxidermy, fossils, skeletons, and even a few strange live beasts.

Museum in a swimming pool where the water still flows.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

This spooky statue sits outside a famous Prague theater.

A series of playful yellow penguins share a serious message about the environment.

Macabre astrological automaton clock dating to the late 1400s.