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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

The remains of Crystal Palace Great Exhibition of 1851.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Hear the quietest sound from across the dome.

An incarceration museum on the spot of possibly the oldest prison in England.

An unusual round church in London with a Templar past.

One part local history, 99 parts gruesome haunted house.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Eighty million natural history specimens call this gargantuan museum home.

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

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

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

Inside this Krakow church, an explosion of psychedelic color.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

The two abandoned overpasses are among the largest bridges in Poland.

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

Modern art commemorates one of the first military actions of World War II.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.