One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

This charming railway is one of the oldest and steepest funiculars in England.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

This historic abandoned train station looks like a stop for ghost trains.

19th century tunnels burrowed under Liverpool.

This amazing 15th-century mural remained hidden in plain sight for centuries.

One of England's most famous churches hides a pair of little known architectural treasures.

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

This skewed English house has looked like it's going to fall over for centuries.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

A quiet memorial to those who died saving others in the heart of the City of London.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

A petite castle folly in the English countryside.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

This antique prison is a tourist attraction with a sordid past.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

The most loyal of little dogs, or a Victorian era publicity stunt?

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.