On the left, 15km north of Tuléar, you’ll come upon a sign for the Mangrove Information Center a 200-hectare wetland complex created by HONKO, a Belgian NGO. The main attraction is a 1.5km wooden boardwalk. It’s a nice place to stretch your legs on the way north, with a trail through the mangroves, educational placards and a lovely tower overlooking a river. Guided tours of between 2km and 4km, and one to three hours in duration, are excellent.