Not a green focused garden but still brings nature indoors and through an interesting way - movement from falling water, sound from hitting stone floor and upwards view to forest
Boston garden photo - taken from such a dizzying height! ("Gawkers, Welcome: House and Garden Tours" - NYTimes.com)
HOUSE TOUR: Inside A Stunning Stone Home In Bel Air, California - ELLEDecor.com
another shape to consider
Kennington Play Centre | Erect Architecture
Garden pondlove the wooden bridges
Could maybe do something like this on side of house. Tie into drainage from hill?
Architizer’s A+Awards Celebrates the World’s Best Architecture and the Firms Behind it. Click here for more information and submit your projects now! Take a ...
Waves of wood form staircase at SDM Apartment by Arquitectura en Movimiento Workshop