Nema is at the eastern edge of Mauritania, an eternity's drive through desolate Sahara or a quick Air Mauritanie flight — scheduled once a week and almost always overbooked. There is nothing particularly special to see here, but the town has a laid-back atmosphere and gives you a chance to encounter people from different nomadic tribes. Timbuktu is not far away across the border in Mali, though getting there may prove very difficult.
Facilities are basic. There is no hotel — camping is possible — but hardy travellers will find a market, a hospital (try to avoid it), and a bank.