This hidden art nouveau gem was designed by an architect in search of a national style.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Four hundred granite steps were built into this massive rock by the National Park Service.

Quite simply the largest tree in the world (by volume).

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An essential stop before plundering, BYO Cutlass.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

An artsy hidden staircase leads to breathtaking views of San Francisco.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The remains of the great moral philosopher reside in a university in London.

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

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A quaint hamlet of nine cottages around a small green near Blaise castle.

The Bristol Camera Obscura housed in an ancient windmill.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The final resting place of soldiers' loyal canine companions.