Each year, millions of holidaymakers enjoy the quiet, clear waters of Lake Powell, which straddles Arizona and Utah. They are also many to sail along its shores to admire the beige or rose hues of the cliffs and the natural arc of Rainbow Bridge. Back on dry land, the play of magical light in Antelope Canyon or the sensational vista over the Colorado River at Horseshoe Bend, just as popular, are well worth braving the crowds to see.