This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

There are hundreds of secret WWII bases hidden in British forests. Built to fight a Nazi invasion, they remained unknown for decades.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

The oldest working mechanical clock in the world.

These skilfully executed, poignant works of art dot a verdant Scottish dell.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

An ancient stone wall formed by lava that was a frequent stop during funeral marches.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

The world's smallest movie theater runs on solar power—an attraction in itself.

The remains of the wrecked steam trawler can be found on the beach at low tide.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

This Cheshire museum has cuckoo clocks, a rare pipe organ and vintage motorbikes. But mostly cuckoo clocks.

A once extravagant mansion, now reduced to ruin.

This Shetland Islands bus shelter may be small, but it squeezes in a couch, a desk, some art, and even an old telly.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

These mysterious mazes carved on the rock may be up to 4,000 years old.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

These medieval tunnels provided water to the city above through centuries of civil war and plague.