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

Rising from the sea like a stone monster.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Three columns of volcanic rock shoot out of the ocean.

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

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

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

A Wes Anderson-esque lighthouse that boasts magnificent coastal views.

Dozens of large, brightly-colored paintings adorn the walls of the "street art capital of Iceland."

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

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

Monasteries on rock pillars, once accessible only by frayed ropes.

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

The first piece of public art dedicated to LGBT rights.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A stunning hermit's shrine on a steep rocky spur in Northern Italy.