For a couple of weeks now I am walking Sherky along Paston Way which is partly an old railway line with lots of trees and squirrels to either side. It is a beautiful walk especially if it is very warm and I use it to calm my hyperactive mind down.
I focus on my breathing and to listen to what my surrounding is telling me. This is a beautiful mindfulness exercise and I encourage you to try it out sometime.
video credit: Luke Skillen on The Dalai Lama Center for Peace and Education via YouTube