The Cirque de Salazie, accessed by road from St-André on the northeast coast, is busier and more varied than the Cirque de Cilaos. The vegetation is incredibly lush and waterfalls tumble down the mountains, even over the road in places - Salazie is the wettest of the three cirques and has the dubious distinction of holding several world records for rainfall.
For real thrill seekers, there's the exhilaration of canyoning, which challenges you to abseil down the steep walls of canyons using natural watercourses. The canyons along this stretch are suitable for all levels. The sport, however, is very vulnerable to the vagaries of the weather, so venues change according to the time of year. The canyoning specialist Ric à Ric produces an excellent guide to Réunion's 39 best canyons.