One of the world's oldest olive trees, thought to be over 2,000 years old.

A curious cave church carved into the face of a cliff.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

The most loyal of little dogs, or a Victorian era publicity stunt?

The once highest point in China blends symbolic design with a kick of adrenaline.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

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

A 12th-century fortress containing some of Berlin's oldest buildings.

Art installations, derelict railcars, and endangered grasshoppers all call this south Berlin park home.

One of downtown Berlin's last reminders of its Communist past.

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

Metro station with a claim to rock n' roll fame.

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

Op-art architecture designed for happiness.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A mocking tribute to the past and modern leadership of Prague.

This historic black and white monastery is one of Bulgaria's architectural jewels.