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

France's most famous cemetery, with some of its most curious tombs.

An important landmark in the history of algebraic logic.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

Certain traditions prevail on the least-visited island of the Aran Islands.

A hugely vast Irish landscape of barren rock that stretches for miles.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

When ecosystems collide in the arid Southwest.

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Even in death, he's still your huckleberry.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Victorian "Fancy Craft" Hair Wreaths and Relics.

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

There are eight natural springs around town, each with a slightly different taste.