These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

The television series' iconic giant foot was borrowed from this classical painting.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

This massive memorial commemorates those who died in the Manchester Arena bombing.

The remnants of a depressing public toilet are now a hub of ever evolving street art.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.

The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

Be on the lookout for the symbolic insect all over the city.

Manchester's abandoned train depot lingers in a post-industrial purgatory.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

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

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.

Have a seat with the father of modern computing at this Manchester monument.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.