I don't know what Werner Herzog is up to these days, but if he's between projects, I humbly suggest that he make a documentary about Luna Luna, the Hamburg amusement park that took more than ten years to put together, included attractions designed by Dalí and Basquiat and Haring and Hockney, and spent thirty-five years in shipping containers. It's now been partly reassembled at the Shed, for the exhibition "Luna Luna, Forgotten Fantasy," through Jan. 5. The park's Fitzcarraldo, a poet-songwriter-pop star named André Heller, was born in Vienna in 1947 and spent much of his thirties persuading artists to decorate rides. Haring slathered a merry-go-round in melty cartoons; Basquiat dressed a Ferris wheel in his customary graffiti. The park opened to the public in 1987, largely funded by a gossip rag, and stayed that way for a summer.