19th century tunnels burrowed under Liverpool.

The Liverpool street made famous by the Beatles is real.

The quiet field that inspired one of the most famous songs of all time.

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.

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

This Manchester laundromat is hiding something.

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

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

A plaque pays tribute to the artist's longtime London home.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The medieval woodcut-style artwork chronicles life in medieval London.

This Underground station has been a popular filming location for decades, even before it closed.

The pockmarks across the building's facade are remnants of the Blitz.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

The commemorative stone column conceals a secret laboratory.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

An architectural oddity hides in plain sight on this iconic London bridge.