What was once supposed to be the symbol of a shining Afghan future is now a bombed-out ruin.

Despite a history of destruction, this former citadel survives to document Afghanistan's oft overlooked history.

Splashes of blue in an otherwise monotonous lunar landscape.

The oldest museum in Borneo is a cornucopia of rare taxidermy and human skulls.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

Giant stone letters dedicated to the founder of Armenia's alphabet.

A geological oddity topped with a 2,000-year-old pagan temple.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

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

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

A marvel of Byzantine engineering under the streets of Istanbul.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

You will not be able to miss this building.

Go deep down into the earth to experience the world of Welsh coal miners.

One of England's most famous churches hides a pair of little known architectural treasures.