A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Plot your trip through the city on the sidewalk.

Ruins of a 10th century church tucked away deep in a botanical garden.

The Pope’s secret escape route.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

A deadly ancient portal to the underworld.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Resting place of Hollywood's immortals is also site of summer film screenings.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The face of a woman pushes its way through the earth.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Remote Honduran Islands with a colorful history.

An Australian lake whose pink hue defies scientific explanation.

Every autumn, this hillside is ablaze with red summer cypress.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

Two plaques commemorate the site of Shakespeare's first theatre.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.