Fishing can come as close to doing nothing as anything I can think of.
It's nice, when fishing, to catch a fish. But it doesn't really matter if you don't. What you always catch is a quiet time sitting at the water's edge, or in a gently rocking boat, a silent time of water and sky and the movement of natural things.
The joy in catching butterflies is the joy of capturing - for an instant - utter beauty. The satisfaction of being able to let it go is immense.
Part of the pleasure of any kind of walking for me is the very idea of going somewhere-by foot.