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

Putting the "mod" in "modular" since 2000.

This London marker celebrates the spot where the world-famous English band was founded.

A measuring mishap led to these artificial stone ladies losing their stomachs.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).

The Tudor-style cottage in the middle of the square is not quite what it seems.

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

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

The oldest residential street in Europe also features an optical illusion.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

Cliffs full of fossils at the portal to England's Jurassic Coast.

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

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

The last four extravagant street signs of London's historic banking street.

This 19th-century pub features stained-glass windows celebrating Victorian-era "champions."

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.