Resonant stone, that has been played since prehistoric times.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

Atop this library is one of the most beautiful green spaces in Warsaw.

The taxidermied remains of a once-great parrot.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

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

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

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

At almost 1,000 years old, this is the oldest known door in all of Britain.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Eighty million natural history specimens call this gargantuan museum home.

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

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This once-derelict building is now one of the most beautiful bookstores in the world.