Chinguetti is a city in Mauritania.
Chinguetti has some of the more postcard perfect sand dunes in the Sahara. You can hire a camel and guide to walk you and your things around the desert, but you won't be actually riding the camel. You can also hire a 4-wheel drive. a better option might be to just go on a hike on your own.
There are plenty of auberges, with beds for as low as 1000 ouguiya. You can also easily walk 5 minutes out of town and camp in the desert.