This two-towered gateway is all that remains of the unluckiest pier in the world.

The world's first successful water-powered cotton mill paved the way for the factories of the British Industrial Revolution.

This tallest folly in the world began its life as an elaborate factory chimney.

Lord Byron's embalmed body lies within this medieval church.

Britain's tallest megalith towers over the cemetery of a quiet English village.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

This unusual geoglyph was built as a warning so low-flying aircraft wouldn't scare the zoo animals.

The last working windmill in the U.K. that has eight sails.

The first privately owned air raid shelter in Britain, built after a horrifying night of Zeppelin bombings.

A blunder resulted in these charming stone-lined streams becoming the target of a Nazi bombing.

This enchanting hill is home to fairy lore and a sinister local mystery.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

The secret wartime bunker built on the platforms of an abandoned Tube station.

A 17th-century church is nestled within the walls of a 15th-century ruin.

Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

A picturesque garden with a surprising past.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

A remote gravestone on the moor marks the spot where a teacher's body was found under mysterious circumstances that remain inexplicable.

The longest stone bridge in England has an impressive history that dates back over 700 years.

A typographic tribute to the many comedic greats who make Great Britain laugh.

Belfast's namesake river still winds below the city center, hidden from sight.

Obscene versions of this artist's work are the most popular.

Legend says the water within these mysterious sacred springs stays cold even when boiled.

A historic Georgian building and warm springs.