Zip-lining, on a volcano, with monkeys, through the jungle. Probably the best zip lining tour ever. This zip line excursion does not cut corners. It is the real deal and you are straight up in the jungle, high in the trees, with the screaming monkeys and birds. You are not rushed, it's just relaxing and fun. I think we went on 18 lines, and I only remember that because it was the same number as if we were on a golf course. The zip lines are in a lush rainforest, on of Nicaragua's National Preserves, and aside from the group that you are with, you feel completely remote.
There are a few tours, and we took ours straight from the base. Side note: It also included a bus tour which went up another part of the inactive volcano to a company that harvested caco beans for coffee and chocolate.