The reef, which nearly surrounds Mauritius, has a major break in it on the south-east coast. Instead of beach and calm lagoon, the sea rushes up against lava rocks and cliffs, carving out a variety of stacks and other coastline sculptures, the best known of which is Le Souffleur. If you walk for about 20 minutes along the cliffs east from Le Souffleur, you will come to a spectacular natural bridge formed when the roof of a sea cave collapsed. To get there take the Plaine Mahebourg to Souillac. About 6km from Plaine Magnien, as you enter the village of L Escalier, is the entry to the Savanna sugar mill. Follow the sign for some 4km to Le Souffleur, through the mill ground and the cane fields. The blowhole is at the end of the biggest promontory, joined to the shore and car park by landfill. Cars and bicycles can go all the way down. You can visit Le Souffleur Monday to Friday from 8am to 6pm and on Saturday from 7am to noon. Entry is free.