Walking 45 minutes is a free medicine. Hills especially, by the time you reach the top, the euphoria may already be there, in sync with the view. Quite pretty. Forests aren't bad either.
My cardiologist once said that simply standing up for 30 minutes would do better than any SSRI. I didn't get it at first and ended up taking SSRI for almost a year due to panic attacks, until I managed to replace it with surf fishing. I'd wake up early, go to the beach, watch the sunrise and stay there for a few hours standing up...
