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

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

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

A six-ton wedding present for the King of the Scots.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

A museum marks and documents the site of the Titanic's launch.

This early version of the guillotine was used to execute the man responsible for its construction.

One of England's most famous churches hides a pair of little known architectural treasures.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

This 16th-century house tells the city's history through old artifacts and quirky tales.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The most loyal of little dogs, or a Victorian era publicity stunt?

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

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Protecting the dead from opportunistic body snatchers.