This Victorian water wheel is affectionately nicknamed "Little Isabella."

The only monument to name all of the passengers and crew who died on the RMS Titanic.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

A small plaque highlights the damage caused by German air raids during World War II.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

There's an exclusive Beefeaters pub hidden in the Tower of London.

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

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

The Liverpool street made famous by the Beatles is real.

A hundred copies of Antony Gormley's naked body stare out across the water.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

The lake that fills and empties itself at random.

A memorial to a goat culled during a foot and mouth disease outbreak guards a series of fantastical caves.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

A harbor town pays tribute to a heroic wartime carrier pigeon.

This stone harbor was key to Carnlough's limestone industry.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

This giant sculpture is both loved and disliked by the local community.

A restored World War II Churchill Mark VII Tank now stands guard in Carrickfergus.

Commemorating the landing of William of Orange with his European army on their way to the Battle of the Boyne.

This mine was once used to defend the coast from attack during World War II.