One of few remaining antique carousels with stationary animals in the U.S.

Only known mainland rookery of the threatened Stellar sea lion.

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

The seamy, underground secrets of Portland's criminal past.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

An extraordinary mixture of natural beauty and man-made phenomena.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

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

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Native Americans built this circle of stones, which was used to predict astronomical events.

The clock that sets them all.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

Possibly the world's only drive-in movie theater with an attached motel.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

This frequently-photographed waterfall takes only a short hike to visit.