Geology in the United States

This balancing rock is one of Utah's most unusual geological formations.

Oregon's only closed-basin hypersaline lake, an important stopover for migrating waterfowl, is in danger of drying up completely.

A small mountain made entirely of banded iron stone overlooking downtown Ishpeming.

Stay in an old lookout cabin atop Oregon's spectacular Winter Ridge.

This spectacular fault escarpment, a popular hang-glider launch point, extends some 30 miles long and towers about 2,500 feet over the valley floors to the west.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

The original building of a mining school endowed by one of the barons of the Comstock Lode now houses a museum of earth science and mining history.

Crystal hunters can dig for their own stones at this DIY mine in Arkansas’ quartz belt.

One of Indiana's only natural sandstone arches is nestled between resort ruins and an old Boy Scouts camp.

Red ocher pictographs survive in this tufa rock shelter on the shore of an ancient lake.

This distinctive snowfield on the slopes of a Colorado fourteener has several legendary origin stories.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

One of the best places to dig—some say on the planet—for six different types of chalcedony.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

You can dig up your own crystals in the quartz capital of the world.