A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

17th-century merchants in Bristol nailed their deals by placing money on these pedestals.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

An array of ancient artifacts from Bronze Age Bristol and other civilizations are housed in this museum.

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

Banksy's image of a naked man dangling from the window of a sex health clinic.

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

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

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The only quarter of the Old City not dedicated to a major world religion.

This full-sized orange tree lives suspended in mid-air above the streets of Jaffa.

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

A Serbian church lit by chandeliers made of weapons.

A misnamed well, with a deep dark past.

Structure built from the skulls of vanquished foes.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.