Death Valley National Park is located in Southern California on the boarder of Nevada. This video is a great overview on what to expect and where to go if you are traveling with a wheelchair or have limited mobility.
The three easiest and most accessible trails are the Harmony Borax Works, Salk Creek Interpretive Trail, and the Badwater Salt Flat (a.k.a. Badwater Basin). The Keane Wonder Mine is barrier-free but is on a hill with inclines. Zabriskie Point is a must-see if you are able to navigate up a wide, barrier-free, paved but steep hill.
Nonetheless, other sites, like the Ubehebe Crater Rim and Dantes View, have access and others may even be seen from the road while still remaining in the car, like the Mesquite Flat Sand Dunes and the Artists Drive. The Artists Drive was a favorite and visitors are welcome to get out at designated areas.
The park suggests some nearby attractions, including Ash Meadows National Wildlife Refuge with three boardwalks that all wheelchair accessible. Also nearby and along the Amargoa River in Tecopa is a China Ranch Date Farm. It’s a very unique place where visitors can buy date bread and shakes. A trailhead begins here and travels about two miles to the Amargosa River; no access has been made but it may be partially or fully accessible to some, whether depending.
Trona Pinnacles is about an hour and twenty minutes from Death Valley National Park. Close to this natural landmark, the road is dirt and closes when weather is bad. Though there’s no official access, visitors can get close in vehicles and many parts are firm enough for some exploration.