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

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

A standing relief of a Norman knight whose posture marks him as a Crusader.

Local legend says the remains of Father Christmas lie within the medieval grounds.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Oldest building in California still in use.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

Each winter this underground cave forms a dazzling ice palace.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The world's largest dead polar bear, immortalized by taxidermy and Hunter S. Thompson.

Drive up a paved road into "Nevada's Yosemite" for exquisite views and mountain hiking in an alpine setting.

Come for the speed, leave in love with the desert.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Largest man-made excavation on earth!

This creepy, abandoned cemetery is all that remains of a once booming mining town.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A coal fire has been burning underground here since 1896.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

The highest point in Oklahoma used to be a lawless outlaw's paradise.