Straddling the Utah and Arizona border, the man-made reservoir of Lake Powell encompasses 186 miles of sandy secluded beaches and gorgeous red-rock canyons for as far as the eye can see. One of the more notable spots in this area is Rainbow Bridge, the worlds largest natural bridge, measuring in at 290 feet high and 270 feet across. In celebration of the 2010 centennial of Rainbow Bridge becoming a National Monument, Lake Powell Resorts & Marinas is offering a great excursion package for two. This deal includes a two-night stay in a traditional room at the resort, daily breakfast, as well as two tickets for a half-day Rainbow Bridge scenic boat tour. This package is valid through October 31 and is priced from as low as $492 for a non-lakeview room with two queen beds.