A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

The summer home of the largest colony of bats in the world.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Ancient pueblos built into the base of a natural canyon wall.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

One of the greatest maze designer’s greatest mazes.

A site of pagan worship which still attracts people looking for fairies.

Dr Barnes' $25 billion private collection of art and arboretum.

One of the most unusual geological features, recognizable from a dozen hit movies.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

A cave's rare beauty held a cavernous secret hidden underground.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

World's largest cave was only discovered in 1991, and now offers tours to the public.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A network of concealed passageways lies within a busy London Underground station.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.