It’s the most expensive photograph ever — and some say it’s no better than a clichéd hotel poster. The ethereal black-and-white image of an Arizona cavern by Australian landscape photographer Peter Lik sold yesterday, shattering Andreas Gursky’s previous record of $4.3 million. “Someone has been very foolish with their money, mistaking the picturesque for high art,” sniffed one critic. But collectors are paying no attention. Lik sold two other photos to the same L.A. buyer for a picture-perfect payday of $10 million.