In the center bed of our back garden, I planted a river of Geranium ‘Rozanne’, inspired by a Hardy Plant Study Weekend lecture by Adrian Bloom. Have a look here at an image of his river of Rozanne. Here is my Rozanne River from various angles in 2015. We had an unusually dry summer; in other summers, this lawn stays green always.
If I could plan it all again, I would make the bed bigger so that it could curve more. Or make it curve out from the bogsy wood. And yet I do like the big lawn area in the back for campfires.