A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

Remnants of a Victorian garden feature sitting in public woodland.

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

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

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

Catacombs turned marketplace.

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

This series of Scottish caves has no clear purpose other than baffling historians.

Spend the night in this formerly abandoned traditional Scottish village.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

The curios of pharmacist and collector Henry Wellcome.

Rebuilt remains of a temple to Roman god Mithras.

The fountain marks the area where hundreds of accused witches were burned at the stake.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Eighty million natural history specimens call this gargantuan museum home.

An unusual round church in London with a Templar past.

The atmospheric road was never meant to be so creepy.

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.

The world's largest collection of witchcraft regalia.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.