A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

America's only nuclear missile silo open to the public.

A reproduction of earth's many biomes.

See massive fossils that are over 200 million years old in northeastern Arizona.

The first archaeological site discovered by aerial photography.

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Hear the quietest sound from across the dome.

Famously misunderstood wonder of the ancient world

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

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

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

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.