Real nature. All those wild animals. Unmarked trails. Being alone! Central Park gives me just the amount of nature I like. Controlled nature. Almost artificial. The grass is well maintained and probably poisened with somesort of chemical to keep it green. Some of the trees are low enough to swing on or climb. The fields are large enough to practice walking silly. The sidewalks are paved and there's tons of playgrounds. Most of the animals are on leashes. There's always someone playing an instrument or tap dancing or having a picnic nearby. But, most of all, Central Park eases my guilt for not giving my kids a backyard.
I think someone stepped on a butterfly. Tragic, I know.