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

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

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

Pop culture has helped to keep this iconic British building from being destroyed.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

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

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

The television series' iconic giant foot was borrowed from this classical painting.

This 1920s Dutch barge is now a floating bookstore.

A tongue-in-cheek arcade where the games are based on everyday life.

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

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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 Harry Potter films.

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

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

This excellent museum recreates the boom days of the herring rush in the "Atlantic Klondike."

At this museum in Iceland, visitors can sample fermented Greenland shark.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This elegant arc of a waterfall marks a religious turning point.

The most powerful waterfall in all of Europe.