The cloud forests in the eastern part of Ecuador make up for some of the birthplaces of the mighty Amazonian rainforest. Waters here eventually trickle, little by little, down to the Amazon basin. Well, the water all trickles except for the thunderous San Rafael Waterfalls which has a drop of 150 m. Not frequently visited, the falls are the largest known falls in the country. Viewing areas are easily accessible from the main road heading up to Lago Agrio. However, due to some unsavoury (read dangerous) activity in the region, few people make it out this way. The falls are well developed, with trails and viewing platforms. Sadly, with a hydro-electric dam planned for a bit upstream, the days of the mighty falls are certainly numbered, a real shame. See it now while you can.