An abandoned colonial French prison notorious for its hellish conditions.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The sign at the garden gate reads: "These Plants Can Kill."

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Surreal riveted sea forts once protected the Kent shores from German attack.

A derelict bit of transportation infrastructure hidden in the woods.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

Abandoned boats decaying in the largest ship graveyard in mainland Britain.

This historic abandoned train station looks like a stop for ghost trains.

A quartet of rusting satellite goliaths are all that remain of a communication network that protected Britain from German and Russian air strikes.