A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

This quaint funicular has been ferrying people up and down an English valley since the Victorian era.

The largest preserved walking dragline excavator in Western Europe.

This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

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

A small waterfall tucked away in the forest of Harmby Gill.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

This aircraft museum is home to one of just three Halifax bombers in the world.

The oldest warship in Europe is still afloat.

A repurposed railway tunnel with otherworldly acoustic characteristics.

This remarkably intact, 260-year-old cargo ship is only visible at the lowest of spring tides.

An abandoned tower once used to study the cosmos hides within a thicket of greenery.

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

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

This colossal war machine is now a living museum dedicated to underwater warfare.

A preserved 18th century steel factory.

This medieval manor house was equipped with secret compartments for hiding priests.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

These remarkable cascades are the jewels of Upper Tees.

An abandoned, desolate train tunnel that was used during World War II.

Quirky Welsh observatory unites art and science.

This pub can leave even the sober feeling slightly unsteady.