This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Early Medieval stones sit on display at the beautiful Govan Old Church in Glasgow.

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

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

This 12-seat movie theater is the smallest in the world.

The remains of a once-famous hotel that also acted as an artist colony.

One of the largest underground systems runs under Canada's largest urban center.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

Welsh literary history is preserved in the delicate pages of these medieval manuscripts.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A mysterious shape catches the eye in this 16th-century painting.

A secret door leads to this cozy dive that sells only “milk.”

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

A roadway designed for a visiting monarch.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

Inside this cathedral is a shoulder bone belonging to the Patron Saint of Scotland.