Mouila is the capital of the Ngounie region of Gabon. It lies on the River Ngounie and the N1 road and has a population of about 20,000 people. Its main sight is the Lac Bleu, a lake known for its bright blue water. Mouila is very spread out and has several markets and commercial centers. A taxi service runs in Mouila. Taxis are green and white and cost 200-500 Central African Francs depending on the distance traveled.