This abandoned gun tower was built to defend the River Thames from a French naval attack.

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

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

This pub can leave even the sober feeling slightly unsteady.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

What was once England's second-richest abbey is now a haunting ruin.

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

Putting the "mod" in "modular" since 2000.

The view that inspired the scenes of Dracula's first landing in England.

This 13th century castle is chock full of ghosts and impossibly rare cows.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

Used as an example in one of the first dictionary entries for "museum" in 1706.

The fences outside some of South London's estates are made from recycled World War II stretchers.

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

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

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

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

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This one has sailed five times as far as Sir Francis Drake's famous ship.

This giant wooden treehouse within a sprawling garden has its own eatery.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

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