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

A fantastic castle rumored to be the birthplace of King Arthur.

This huge coastal nature reserve in Wales was a stand-in for the Arabian Peninsula in 'Lawrence of Arabia.'

At the United Kingdom's only residential library you can sleep among the books.

A subterranean playground in an abandoned slate mine.

This disused Cold War bunker has been restored to all of its early 60s glory.

Regency-era excess on the English Coast.

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

A 200-year-old prison that now houses a peculiar crime museum.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

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

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

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.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

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

A modern English garden of eccentric beasts, follies, and oddities.

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

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.