The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.

This effigy was crafted to annoy a neighbor after a civil dispute over a foul smell.

This former hospital was once one of the oldest mental health facilities in Europe.

This church also serves as a lighthouse complete with a beacon.

For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.

An archaeological site believed to be the burial place of the "mother of us all."

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

This bazaar is one of the oldest in the Arabian world.

This spectacular mosque houses the second-largest chandelier in the world.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

A monument to the man who almost killed Hitler.

Berlin's old airport.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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.

This watchtower once presided over the Berlin Wall.

This monumental work of art symbolizes the coming together of a previously divided city.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

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

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.