The first American department store, and home to the largest operating musical instrument in the world.

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

A layered tribute to the work of mosaicist Isaiah Zagar.

The world’s first penitentiary, meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An Inca spa, military outpost or maybe… both?

Death rituals and sacrifice inside a Peruvian megalith.

Did Inca children also slide down these smooth rocky slopes above Cusco?

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

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

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

A market for witches is hidden within a train station.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Quito's historic, main square dates back to the 16th century.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.