Three wildly colorful calderas top this otherworldly volcano chain.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

One of Europe's oldest libraries.

Hidden in plain sight, this creepy sculpture watches from above.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

A dramatic sculpture high up in Yorkshire with vistas on an industrial scale.

This 11th century tower is said to be the oldest building in Oxford.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

Britain’s longest ancient monument, this great 8th century earthwork was built to mark the boundary between what would become England and Wales.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

At 1,732 feet above sea level, this spectacularly isolated yet surprisingly bustling bar is the highest pub in Britain.

The abandoned railway bridge stands hidden in the farmland of rural Cumbria.

A spectacular disused railway viaduct in a beautiful countryside nature reserve.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

England's "pier at the end of the universe" unites astronomy and contemporary architecture.

The longest and steepest staircase locks in the United Kingdom.