I am going to start with the cottage because it is designed specifically to the site conditions, topography and outlook. The 100m-high mini waterfall is the prime attraction, but the views towards the mountains on the deck-side are just as spectacular.
The cottage is designed with the kitchen and living room on solid ground, while the bedroom wing is stilted over the watercourse to take advantage of the views in both directions. The stilted half will need to be built of wooden materials for ease of construction and costs. Contact me if you need to discuss further options.