The mouth of Grapevine Canyon, a dirt road drive from the highway and a short hike in, contains the densest petroglyth panels I have seen.

Petroglyths at Grapevine Canyon
Mojave National Preserve, about 1.5 hours southwest of LV, features a rich variety of desert environments. Paved and bladed roads make much of the hiking, camping, sightseeing, and wildlife accessible without an SUV. At this time of year, I found the desert in bloom, the Joshua trees in flower, and the desert tortoises active.

Kelso Dunes
My list of places to visit on future LV trips:
In addition to Ash Meadows, other areas of interest in the Amargosa River area are Oasis Valley, Amargosa Canyon, and Shoshone/Tecopah
Muddy Mountains Wilderness Area
Buffington Pockets along the Bitter Springs Trail
Muddy River / Meadow Valley Wash
Mojave National Preserve's Piute Gorge.
Earthworks artist Michael Heizer reportedly has threatened to shoot anyone who tries to visit his monumental City uninvited, but this piece, near Nellis' infamous "Area 51", sounds like the must-see sculptural descendant of Tikal and other ancient American sites.
Please share your experiences in these places or suggest additional locations for Future Expeditions by commenting to this page.
Desert National Wildlife Refuge is located in the Mojave north of LV, with three 4WD access points off Highways 93 and 95. Visitors are on their own and should be well researched and equipped for the backcountry. This year's forays were scouting trips for future expeditions.

Recovering Yucca Forest - Mormon Well Road
Pahranagat National Wildlife Refuge is an oasis of lakes along Highway 93 about 80 miles north of LV. Birding, camping, and native rock art are its principal offerings, but it also contains a 4WD access into the Desert National Wildlife Refuge.

Upper Lake
2+ hours outside of LV, on the way to Death Valley, is the Ash Meadows National Wildlife Refuge. Springs fueled by the underground Amargosa River create oases and provide habitat for endangered species of desert pupfish. The lush vegetation and tropical-colored fish are a striking contrast to the surrounding alkaline uplands of the Mojave desert.

Death Valley National Park has a severe and subtle beauty that takes at least a couple of days to appreciate. Go during the cooler weather when you can hike around; it was already getting too hot in late April. ~3 hours from LV.

Mesquite Dunes near Stovepipe Wells
Zion's spectacular geography delivers drives, hiking, and camping of all varieties and challenges. ~3 hrs. out of LV on a drive that crosses the desert and ascends up onto the Colorado plateau via the Virgin River Canyon.

Heading Into Zion Narrows
Rhyolite is an almost-ghost of a mining town, featuring an unusual mix of historical buildings and contemporary outdoor sculpture. It's off NV HWY 374, one of the routes in and out of Death Valley.

Sculpture at Rhyolite Townsite