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.

The headquarters in Salem doubles as an occult art gallery.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A flower grows on this giant stone that is said be able to control minds.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

In Bermuda, this formal naval residence has become a go-to for cliff-jumpers and hikers.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The world's smallest drawbridge.

This 18th-century former mosque held the first Hellenic Parliament.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

A staircase made of gravestones leads up to this church built into a giant rock.

The Greek island's old British cemetery feels like a forgotten garden.

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

The ghost town where the villagers refuse to leave.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

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

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

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

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

Giant marble phalluses on the sacred island of antiquity.

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