The most northern place on the mainland of Great Britain.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

A 2,000-ton rock resting in a state of a delicate balance.

Stonehenge has nothing on Castlerigg’s views.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.

What was once England's second-richest abbey is now a haunting ruin.

The second smallest castle keep in England.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

One of the largest mechanical models of the solar system in the world.

The stately remains of Llywelyn the Great's mighty fortress.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

An unexpectedly extraterrestrial room in a former Victorian resort club.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

These precariously placed ruins harken back to a 13th-century castle.

The longest and tallest aqueduct in Britain can actually be sailed across.

The 20-mile causeway that separates the Netherlands from the sea.

One of the few places in the world home to living stromatolites.