This steel sculpture made from a recycled crane towers above a former shipyard.

This tribute to Sunderland's mining past stands outside the home of its football club.

This lonely bronze walrus celebrates a character in a Lewis Carroll poem.

Huge winged monument in the United Kingdom.

The only surviving leech house in the United Kingdom was a home for bloodsucking worms until the 1900s.

At 22 feet tall, these Bronze Age monoliths are some of the tallest standing stones in the United Kingdom.

Alien rock formations grown from the sands of an Australian national park.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

The last four extravagant street signs of London's historic banking street.

London's amazing modernist public square that never was.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

A tribute to all the green-thumbed workers who tend London’s public parks and gardens.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

An ancient water supply dating back almost 500 years can still be found standing in East Sussex.

Two gilded cherubs perched on a church bell tower have been reminding visitors of the finitude of life since 1760.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

A quiet memorial to those who died saving others in the heart of the City of London.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."