Hugh Pickens writes "The Atlantic reports that the world's largest freestanding building, measuring more than 1,100 feet long and nearly 700 feet wide and meant to serve as the construction site for a massive helium machine that would function as a delivery vehicle for oil rigs, wind turbines, and other industrial equipment has been converted it into a huge water park that now sees nearly one million visitors annually. Built more than ten years ago on an abandoned Soviet military base in Germany at a cost of $110 million, the resort features the world's largest indoor rainforest, which includes more than 50,000 trees; a swimming pool that is larger than four Olympic-sized pools together; 600 feet of faux beach; a nine-story waterslide; and other amenities. Former owner Carl Von Gablenz, who now runs his company from an office in Berlin, is still optimistic about the future of airships as cargo haulers. For craft that can lift 40 to 50 tons, he says, 'there are very large market segments...in Canada and Siberia.' He's bitter that his hangar was sold for a swimming pool.'"