An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

An artificial crater field that trained astronauts for lunar exploration.

Ride aboard a centuries-year-old steam engine and explore dozens of trains parts, including an unusual "comboose."

Grotto replete with mystical designs laid out in glued shell mosaics.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

Every May, townspeople welcome summer with a bizarre pagan parade led by a man wrapped in garlands.

This remarkably intact, 260-year-old cargo ship is only visible at the lowest of spring tides.

A Victorian Fort built into the chalky cliffs that overlook the English Channel.

England's most notorious suicide spot.

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

Decrepit Victorian public lift is a white-knuckle ride.

A picturesque garden with a surprising past.

This colossal war machine is now a living museum dedicated to underwater warfare.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

A open air theatre built on a cliff by an eccentric British woman.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This bridge over the River Cuale leads to a neighborhood that was once an escape for Hollywood's elite.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.