The castle still holds traces of the abandoned Roman fort it was built atop.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

Hundreds of huge, centuries-old horseshoes adorn the walls of this nontraditional 12th-century castle.

The sanctuary seems to either float atop the water or sink into the dirt, depending on the water level.

Constructed 20 years ago, this sculpture is slowly fading to the hands of time.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

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

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

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

The taxidermied remains of a once-great parrot.

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

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

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

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

The cedar tree in Highgate Cemetery earned its title by accident.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Buddhist pilgrims journey to this sacred rock to leave offerings and have their wishes granted.