Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

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

An Iron Age hillfort rooted in Arthurian legend was made famous by musician Peter Gabriel.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

Its collection includes a broad array of social, geographic, graphic design, and political history.

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

The sumptuous ceiling was one of the last things Charles I saw before his execution.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

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

A hands-off space for graffiti artists to hone and display their skills.

Ship-sized kinetic sculptural fantasy.

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

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

The remnants of a facade from a 19th-century market stall emporium.

An artistic interpretation of the history of a Scottish park, combining poetry with anthropomorphic animals.

This early version of the guillotine was used to execute the man responsible for its construction.

This neon sign is an homage to an Alfred Hitchcock film.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Once designed as a natural history museum, this building is now home to a massive art gallery.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.