A good bench with a backrest always hits the spot. The Chester Greenway, from the Hawarden Bridge end, is richly supplied with flat stone seats which I ride past with disdain, until I'm almost too knackered to get off the bike by the time I reach the real benches.
The first time I did my Chester Zoo route I collapsed in a field, used my trainers as a pillow, and lay there for about half an hour. The second time, I was very much looking forward to doing the same thing, but the bloody gate was closed. So I eventually found a bench. With a backrest.