A chance to sleep among the firs and pines of the Oregon forest.

This natural marble cave is one of only five national monuments in Oregon.

A botanic garden full of trees twisted into fantastic shapes and positions.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

This historic national park is covered in the stunning ruins of red rock pueblos.

A tunnel with windows, so you don't miss out on the impressive views.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

The drama of nature in full effect in this Nevada State Park.

Named after an outlaw who used the basin as a hideout.

Decades' worth of lost and forgotten objects make up the collection of this tantalizingly odd little museum.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Harder layers in colorful sandstone weather out as prominent “fins" and even more intricate and bizarre shapes.

An unusual slot canyon in the Aztec/Navajo Sandstone has a cross-section like an inverted old-fashioned keyhole.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.