A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The decaying ruins of Wales' first asylum for the mentally ill.

A subterranean playground in an abandoned slate mine.

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

A unique waterfall that some believe attracts the fairfolk.

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

The largest greenhouse in the world is home to over one million types of plants.

400-year-old garden, restored to beauty.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

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

Famously misunderstood wonder of the ancient world

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

These fantastically named natural pools look like something out of a Scottish myth.

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

This restaurant was removed from the famed sister ship of the Titanic and placed within a hotel.

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

This medieval manor house was equipped with secret compartments for hiding priests.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.