An extraordinary "City of Caves" carved from solid stone.

The remains of what was, not so long ago, the world's largest city.

Scholar, adventurer, saint, and instigator of the Goa Inquisition.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Sacred Indian temple that’s all monkey business.

Go inside to really appreciate this 500-year-old technological masterpiece.

The world's second-largest sundial, made entirely out of stone.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

This famous archeological mystery may be an ancient example of movable type.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A 200-year-old collection of oddities and medical paraphernalia.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

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

An encyclopedic collection of mammal penises.

This stunning concert hall has become a symbol of Iceland's national recovery.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.