I want to add, that in my recent trip to Costa Rica, at Hacienda Altagracia, they offer Ultralight flights on their glider aircrafts. This looked amazing...yes, I chickened out...you actually sit in these two seater planes, no casing/glass...almost like a WWI plane but seat is barely above your waist (and with knees bent, a portion sticks out), The pilot sits in front and you sit in the back compartment...very fast and they fly over the mountains/waterfalls...next time I'll have a drink first.