Walking with my cat in the park

I enjoy going to the park with my cat. In  an ideal world I'd let him go outside by himself. But I don't want to lose him to a car or a stray dog...
So my cat has a special harness and an extending leash for those occasions when we are going out.
I think that going outside helps preventing boredom related depressions in domestic cats and makes a fun activity for the whole family.
In this picture Tisha is enjoying the view of the river.

Here Tisha is trying to climb a tree. I think it's a healthy exercise for my cat. I just have to watch him not to go too high.