One of my favorite childhood nature memories is when I climbed a tree that had branches that formed a nice backrest and I was so comfortable sitting in the tree that I fell asleep! The branches cradled me nicely, and I didn't fall out.
Another favorite memory is the first time I saw an Osprey in real life after looking at its picture in a Field Guide many, many times. The Osprey was so much more beautiful in person than in the Field Guide.