Haven’t been getting on the bike much recently since I picked up running again, but I live near an awesome trail that goes to the beach. It’s got a gnarly ascent at the beginning and then goes down all the way to the ocean.
I’ve never made it all the way down to the ocean because I’ve dreaded the climb back to the peak but someday I’ll tackle that fully.
There are also organisms that live off of thermal energy, which I think are not part of the plant kingdom. But I could be mistaken.