Places Added by slgwv

A large wave-cut arch in limestone, carved by Pleistocene Lake Bonneville, is perched atop a ridge.

The only place in the Grand Canyon where an automobile can be driven to the Colorado River

A remote mine in sedimentary rock was called the richest copper ore deposit in Arizona Territory

The junction point of Arizona, Nevada, and Utah, resurveyed and remonumented in 2016

The forlorn remains of a late Cold War radar installation are decaying in the Oregon desert

An old copper mine in Plumas National Forest, formerly served by a tramway, seems to have been successfully remediated after years of acrimony and effort

The gateway to the goldfields of British Columbia, at the head of navigation on the Fraser River, features Gold Rush era buildings, artifacts, and living history exhibits

A 1920s navigation arrow for airmail is preserved right off Interstate 80 near the southern edge of the Great Salt Lake

This one-room school in the tiny railroad settlement of Elgin didn't close down until 1967

The last surviving footbridge in the Yakima Canyon, now a historic landmark, provides access to wilderness west of the Yakima River

Traces remain from early Cold War experiments on the vulnerability of underground installations to surface explosions

A junction in the Death Valley backcountry marked by old crankshafts

An isolated, relict ponderosa pine forest in central Oregon that survives on half the usual rainfall due to a geologic quirk

A remote memorial to Major Michael Adams, the only test pilot to lose his life in the X-15 rocket plane program

Ruins of this late 19th-century mining camp are right on Nevada State Route 266

Collapsed charcoal kilns in the Spring Mountains of southern Nevada.

Steel rings embedded in rock enable hikers to ascend a picturesque slot canyon in the Mojave Preserve.

The only perennial creek in the Mojave Preserve is also the site of an 1860s fort.

An improbable creek near Death Valley, not far from the oldest surviving Euro-American structure in the Mojave Desert.

One of two observatories in the U.S. that routinely detect gravitational waves.

A photogenic rock-art site that is also a popular climbing and canyoneering area.

A construction mishap at this narrows on the Fraser River rendered it impassable to many migrating fish species, with international consequences.

Traces of General Patton’s Mojave Desert training camps for the North Africa campaign.

This extraordinary project brings water from the Colorado River to Southern California.