A network of concealed passageways lies within a busy London Underground station.

A memorial to a dog that inspired rioting in the streets of London.

Heralded as the oldest statue in London.

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

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

This underpass became an unlikely piece of cinematic history after its appearance in 'A Clockwork Orange.'

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The final resting place to 300 Victorian-era pets hides inside the city park.

It is against the law to obstruct the view from the top of this English burial mound.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

Built by George III to observe the transit of Venus, this Georgian gem is a unique survivor in the Arcadian landscape of Richmond upon Thames.

The Egyptian-inspired last resting place of Lord Kilmorey.

A mysterious bridge over a sunken Roman road.

A masterpiece of Art Deco architecture hidden in plain sight in West London.

17th-century tradition of public weighing is met with boos or cheers depending on the Mayor's weight.

Six neolithic sandstone boulders remaining from a dolmen.

Pyramid shaped monument with a tall tale attached.

A thousand year old oak tree survives in Liverpool.

Rent a barrel for a personal view of where the Baltic Sea meets the Gulf of Riga.

Surreal works of unreal stone and metal dot the landscape of this Latvian art park.

The statue of a legendary giant who carried Christ and shouldered the world's sins.