South of Tamanrasset, Amsel is a nice excursion, and a great hideout during summer heat. Near Amsel, there is a reservoir, where nobody will object to your swimming. The water is clear and clean, and nicely temperated. Amsel itself is very much a standard village, but OK to take a walk around in, as long as keep fresh in mind that you're out into the Sahara desert.
Eat and Sleep Nothing of hotels and restaurants, go back to Tamanrasset.