An air-conditioned landscape-within-architecture-within-landscape architecture-monument-landscape as proposed by the engineer Charles-François Ribart for a site where the Arch of Triumph now stands in Paris. I personally prefer Ribart's. Where else can you now dine in a forest in the underbelly of an elephant? The mad modern Parisian traffic might be circling outside, but inside you're refreshed and calm, cooled down by an elaborate internal pachyderm hydrology.