This 900-foot structure with 20 arches crossing a Scottish river was built in the late 19th century.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

The ruins of a world-renowned medieval hospital.

The oldest subscription library in Britain was started by lead miners in southwest Scotland.

A working farm turned into a museum dedicated to the world's most unbelievably tiny cars.

The last working windmill in the U.K. that has eight sails.

Believed to be the birthplace of John Balliol.

These crumbling ruins are all that's left of the ancestral home of Clan Crawford.

This old village lock-up is known as the "round house," but it is actually octagonal.

The ruins of an unfinished explosives factory can be found while taking a gentle stroll through a Manx glen.

This home of a taxidermy hoarder is among the grandest and most singular of historic English estates.

One of the oldest libraries in England, and one of the last of the great medieval chained collections.

The near loss of the stately fireplaces at this medieval castle spawned some of Britain's most crucial historic preservation laws.

A watchhouse constructed from tombstones, to make way for a burial pit, for the victims succumbing to a deadly disease.

The longest stone bridge in England has an impressive history that dates back over 700 years.

The site of one of the largest non-nuclear explosions in history, created when a massive bomb dump accidentally exploded.

The main gates have been locked since 1745 and will remain so until the Stuart Dynasty returns to the throne.

This unique museum is housed in a rare example of an early 19th century prefabricated cottage.

This tiny shoe shop claims to be the smallest store of its kind in Britain.

This former Victorian bathhouse was all the rage during the mid-19th century and put Woodhall on the map.

This lone tower casts an outstretched shadow over the site of a once-wealthy Knights Templar preceptory.

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

A curious urban windmill once owned by a renowned British mathematical physicist.

A labyrinthine underworld of tunnels and caverns hides beneath the city.