Nice option too container/raised bed herb gardening. Some of these herbs won't stay small and cute, so would need to plan to plant the taller ones in the upper tiers and maybe with a little bit larger growth area.
DIY - Homemade Gabion wall ie rocks encased in wire baskets and used as a retaining wall - creates a dramatic feature in a garden. No directions on link. Nice someone figured out how to landscape with river rock. I swear they grow!