A monolith stands at the site of the most significant battle ever fought on British soil.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

English Protestants once criticized this enormous private chapel for being too ornate.

In the U.K., a historic workhouse shines a light on the early, harsh treatment of the poor.

A 13th-century inn where the ill-fated King Charles I spent his last night of freedom.

Once a palace for the Archbishop of York, these 15th-century ruins now serve as a haunt for history buffs.

A magnificent mansion hides a delightful collection of historic timepieces.

The final resting place of hundreds of Polish airmen who died fighting the Nazis in Britain.

This English medieval castle is where King John died of dysentery.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

A curious urban windmill once owned by a renowned British mathematical physicist.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

The longest stone bridge in England has an impressive history that dates back over 700 years.

This old village lock-up is known as the "round house," but it is actually octagonal.

This early 19th-century blast furnace only survived because it was a financial and technical failure.

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

Beasts and branches swirl in sandstone carvings, interrupted by one strange creature.