Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

This Scottish bridge seems to compel dogs to leap to their death.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

The ruins of a small church belonging to a powerful Scottish family still hold the remains of its patriarch.

Did the legendary Scottish knight William Wallace actually take refuge here after a major battle?

It's said this was once the home of King James V's pet lion.

This uniquely shaped rock formation is one of Scotland's most iconic mountains and gives spectacular views in all directions.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

A 200-year-old collection of oddities and medical paraphernalia.

A museum wholly devoted to juvenescence.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

An unusually shaped lighthouse with origins rooted in heartbreak.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

This remote Scottish island has the only round church in the nation.

It's believed a castle existed at this site since the 12th century.

Visit the grave of a famous feminist author and the mother of Mary Shelley.

Giant, friendly pelicans in Central London, the most unlikely of places.

Catacombs turned marketplace.

A little slice of Japan and its aesthetics in London's Holland Park.

This 1920s Dutch barge is now a floating bookstore.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.