An acoustic anomaly with a mysterious cause.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

Obelisks and stone pineapples in the Irish countryside.

This Scottish manor house is a lush relic from the life of a literary great.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Modern commuters still pass through this 2,000-year-old Roman archway.

This gorgeous space is England's largest independent library outside of London.

Thrilling and delicious complement to any dining experience.

These centuries old gardens have been restored to their 17th century condition.

"The Donut" was built as part of an expensive, ill-fated engineering endeavor.

This tiny town features a tiny town that acts as a 3D snapshot of the town during the 1950's.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

This beautiful example of Victorian engineering is the oldest water-balanced funicular anywhere in the world.

This charming railway is one of the oldest and steepest funiculars in England.

Seat of the Duke and Duchess of Devonshire for centuries.

One of England's most famous churches hides a pair of little known architectural treasures.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.