This enormous sinkhole hides a secret world created from divine wrath.

This hermitage spanning an Italian river gorge draws pilgrims hoping to heal ailments like arthritis and migraines.

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.

A surreal botanical garden with an even more surreal tour guide.

Once the hunting reserve of a noble family, this is one of the few remnants of Pleistocene planitial forest in northern Italy that still stands.

This crystal clear water basin feeds the Lao river and powers a hydroelectric power plant.

Six paintings reminding you that death is integral part of everyday life.

A devastating landslide accidentally created this tourist hotspot.

Statues portraying anatomical deformities were placed in this garden to foster ethical behavior.

The walls of this tiny Italian church are entirely covered with frescoes.

A gorgeous example of 13th-century Gothic architecture.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

This black church sits alone among a field of lava rock.

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This replica Viking village was created for a film that was never shot and is now open to visitors.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

These otherworldly formations were shaped over millions of years by the forces of nature.

The cluster of igloo-like domes forms the remains of an ancient burial ground.

Over the dunes of the Empty Quarter, the mysterious music of the desert.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

An abandoned desert hamlet swallowed up by sand.