This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

A perilous medieval road leading right into the sea.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

A remarkably well preserved tower dating all the way back to the Iron Age.

A pub that is literally in the middle of nowhere, but continues to do business.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Pop culture has helped to keep this iconic British building from being destroyed.

The oldest inn in England served brew to the crusaders.

England's most notorious suicide spot.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

This Scottish bridge seems to compel dogs to leap to their death.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.