This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

Fantastically decorated underground chambers built in the 1760s.

A breathtaking flower tunnel bursts with beautiful golden blossoms.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

Public access to clean drinking water was an instant hit among the masses.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

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

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Traveling collection of amazing automata.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

A network of concealed passageways lies within a busy London Underground station.

At high tide this strange footbridge appears to have no purpose whatsoever.

A site of pagan worship which still attracts people looking for fairies.

This hidden green space is the city's second largest conservatory.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

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

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.