A contemporary hardscape, with its simple lines and low profile, also works well when paired with the natural landscape. Here, the garden itself has a low profile, allowing the hillside foliage and the view to be the stars of the show.
In this setting, the boundaries between garden and nature are distinct, but you can also gradually blur the line between the formal and natural spaces. For example, use native plants in formal rows to line the edge of your space, then gradually loosen the rows so they begin to blend into the free-growing space beyond. Another idea would be to use a water feature as a bridge between the two spaces.