If you're looking for outdoor excitement, make a day trip to Mt. Naukluftberge. No easy stroll around the block, this hike is perfect for some mid-vacation exercise.
Located in Sesriem, this steep landmass is worth including in your schedule. But you'll find tons more to see and do in the area. Sesriem Canyon, and Elim Dune aren't too far away from Mt. Naukluftberge.