One of the world's largest Tesla coils.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

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

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

The world's only managed flock of mute swans was established as a factory for monk meat but is now an adorable sanctuary.

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

An unusual round church in London with a Templar past.

The taxidermied remains of a once-great parrot.

A clock designed to run with perfect accuracy for 10,000 years.

A museum wholly devoted to juvenescence.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

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

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

This medieval church tower has maintained its clockworks since the 16th century.

A historic arboretum and non-conformist, non-denominational park cemetery.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.

A friendly pub with a sordid past in cock fighting.

Hear the quietest sound from across the dome.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.