When Olafur Eliasson's NYC Waterfalls start roaring on the East River and New York Harbor this June, cruises like Circle Line will be bringing passengers so close to the spray they’ll need to stock ponchos on board. Sure, you could just look at the falls from any number of points on the shore, but tour boat companies are betting that plenty of people will gladly pay for the Man-Made of the Mist experience. A press......