All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

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

Ancient human remains unearthed around the iconic monument.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A pastry shop specializing in Sephardic sweets serves historic recipes in Ribadavia’s Jewish quarter.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

Commonly acknowledged as the only public monument to the Devil himself.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A unique tribute to the millions of animals who served and died for the British military.

This secluded walkway overlooks a magnificently wild London green space.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

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

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

Largest lake in Great Britain measured by surface area.

A close look reveals that the Scottish monument is just slightly off-kilter.

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

Banksy gives themself artistic license with this piece of London street art.