A Byzantine-era church hidden in a wooded area below the Acropolis.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

This plaque in one of London's oldest public hospitals commemorates the first meeting of two of Britain's most famous literary heroes: Sherlock Holmes and Dr. Watson.

The bones of two medieval royal lions were discovered at the historic fortress.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Dictionary Johnson’s favorite feline.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

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

A cluttered and astounding collection of antiquities and curiosities.

Hear the quietest sound from across the dome.

An unusual round church in London with a Templar past.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This coffee shop lies hidden beneath a historic church.

Open since 1912, this restaurant is one of the few left that serves chicken with lobster and other Catalan-style surf and turf staples.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Its interior is adorned with some of the best examples of early Christian mosaics.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.