The ominously named cave is home to some remarkable ancient art.

The largest stone moai on Rapa Nui.

Remnants of successive wars and Muslim colonialism in the 11th century.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

1513 Turkish world map, full of European state secrets and snarky commentary.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

Naturally protected city carved from a rock face.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Uganda's smallest savannah park is home to over 350 species of birds and mammals.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

The home of half the world's population of critically endangered mountain gorillas.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

A comprehensive museum dedicated to Africa's oldest modern republic.

Based on a real event, the statue is dedicated to those who fought and died for Zambia's independence.

The abandoned tower is the last remnant of Lusaka's first major power plant.