Bring enough water to the hike taking into account the way back, as the path can be exhausting and it takes longer than 1.5-2 hours (which is what the locals told us).
This green lake contrasts with the rest of the park because it is surrounded by slightly less dense vegetation and a little higher up there are meadows with humped cows.
It's included in the Arsenal National Park entrance fee and is far less visited. You can see quite a bit of wildlife. The approach via the unpaved road from Arsenal …