Solitaire is a small settlement in the Khomas Region of central Namibia near the Namib-Naukluft National Park. It currently features the only gasoline station, post office, bakery, and the only general dealer between the dunes at Sossusvlei and the coast at Walvis Bay, as well as to the capital Windhoek.
https://en.wikipedia.org/wiki/Solitaire%2C_Namibia