This overlooked street light once served as a KGB dead letter box.

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

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

An artistic tribute to the famous singer, just around the corner from where he was born.

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

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

This skewed English house has looked like it's going to fall over for centuries.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

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

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A unique seaside cave where Aleister Crowley faked his own death.

The world's oldest bookshop still in operation.