The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

This tiny watering hole claims to have the smallest bar counter in Europe.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

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

This London plaque marks the spot where David Bowie's famous alien made his debut.

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

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

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

London's old-school healing garden.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

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

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

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

Rebuilt remains of a temple to Roman god Mithras.

One part local history, 99 parts gruesome haunted house.

An unusual round church in London with a Templar past.

Seat of the Duke and Duchess of Devonshire for centuries.