I saw a billboard recently that said "Explore nature, there are surprises everywhere". Pictured, it has kids in a forest, with Shrek. Personally, I think the presence of Shrek does a disservice to the message.
The reason is that Shrek isn't in nature. But things much more wonderful and amazing are. Nature has the Grand Canyon. Nature has Mount Everest. Nature has Angel Falls and Yellowstone and the Redwood forest.
There are trees literally thousands of years old. There are fungal colonies that cover miles of land. There are organisms that can survive boiling temperatures, or extreme radioactivity. There are even animals that can survive being in space.
There's no fiction that can compare to the magic and fantasy of real life.