A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

An emerald-green grotto just a short trip from Austin.

Rippling sand dunes frozen in the Arizona rock.

A terrific purveyor of natural history objects and curios.

A frozen relic of Seattle's hydroelectric boom is now a teaching facility for future engineers.

This painted blacktop brings the classic arcade game to life.

Sweet or salty, super hot or mixed into beer, this is the holy land for all things licorice.

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

The illuminated falls are a gem in North Cascades National Park.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Old submarine parts have been converted into faux whale fins.

A fine, large-aperture telescope available for public use.

Shoreline strewn with the remains of ghostly fallen trees.

This medieval village/restaurant perpetually celebrates the year 1376.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

An obscure waterfall that looks like something out of a fantasy novel.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.