Fantastically decorated underground chambers built in the 1760s.

This tangled English forest looks like something right out of a fairytale.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

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

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.