The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

King Carlos IV laid the first stone during construction of this chapel.

The former home of a conniving 17th century politician is now a high-end hotel.

The largest cave on the island of Menorca was likely the site of Iron Age rites and rituals.

This historic electric train has operated with regularity since the early 1900s.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

These ancient artifacts are a testament to the enduring significance of the bull in Spanish culture.

This Roman arena once played host to bloody gladiatorial battles.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

A pair of gigantic baby heads greet passengers at Atocha Station.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

Living towers made of people that are now recognized by UNESCO.

The ruins of an ancient Celtiberian town with incredible rock-cut buildings and a Roman aqueduct.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

This beautiful spit of land was once the summer playground of the king of Spain.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Religious dwelling in a Spanish volcano.