An intricately decorated tiny place of worship.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

6000-year-old site covered in more than 50 megaliths.

The largest hewn stone in history.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

It houses the remains of a 17th-century version of the Titanic.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

A battle between nature and architecture in the Cambodian jungle.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

England's most notorious suicide spot.

Bridge that died in war and was resurected.

Fortified medieval tower house with lovely roof garden.

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

Giant naked man on a hillside.

A "miracle" that seems to produce more holy fistfights than holy revelations.

A student driver's nightmare.

The remains of Crystal Palace Great Exhibition of 1851.

An ancient capital city that dates back 3,000 years and harbors many surprises.

Ruins of the Crusaders' headquarters.

Northern Ireland's Brobdingnagian stepping stones.

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

Climb inside an iron crystal magnified 165 billion times its normal size.

This "floating railway" is one of the world's oldest monorail systems.