Adults need to have fun too! Any slide for adults in a house is a great idea, but this one contains a water slide. Excellent choice of transportation and you can even get a shower on the way out of bed going down to get breakfast!
47 Irresistible hot tub spa designs for your backyard
This "natural" outdoor hot tub would go great with my Japanese garden theme. It is almost like a hot spring. I'd get rid of the ugly fence in the background though and have a lot of flowers, trees, and bushes.
Asian Water Garden: This garden takes advantage of the natural landscape of Yachats, Oregon, combining it with the simplicity and tranquility of Asian garden design to create a living courtyard surrounded by the residence.
A big sauna with a huge window looking out on the forest and the outdoor hot tub that's big enough for many people to warm up from the cold. This could also be used as a cold pool for dunking after sweating in the sauna.
Outdoor Kitchen - Designing The Perfect Backyard Cooking Station