One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

These "bridges" help confused bats cross the road.

Massive galleon from a box-office bomb docked in Genoa.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

This antique prison is a tourist attraction with a sordid past.

A 16th-century artillery fort built to protect England against European invasion.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

The intended purpose of this unfinished Elizabethan building remains a mystery.

A rare example of the RAF’s flying spy taxi.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

The longest and steepest staircase locks in the United Kingdom.

A monument at the site of a decisive battle in the First English Civil War.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The first archaeological site discovered by aerial photography.

Famously misunderstood wonder of the ancient world

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

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

These picturesque ruins crumble beautifully into the ocean.

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

Wooden sleds have replaced donkeys to cart goods around this utterly charming car-free village.

Arthur, Merlin, and Guinevere are among the largest and oldest satellite dishes on the planet.