Raft Calderas river, a clear green river that carves through untouched Colombian rainforest. Start the adventure in Medellin and drive for 2 hours to playa loca via Medellin-Bogota highway. Raft the Calderas river 1 hour with class III rapids. This rafting experience is beyond just paddling whitewater, it’s a fascinating journey into the heart of Colombia’s most untouched rainforest. Ask for join groups. This activity starts with 3 people.