Rainbow over wind-whipped waves. Waterton Lakes National Park, Canadian Rockies, Alberta, Canada.

A rainbow glows in spray whipped up by 50 mph winds on Waterton Lake in Waterton Lakes National Park, Canadian Rockies, Alberta, Canada. Or maybe call it a spraybow! In 1932, Waterton-Glacier International Peace Park joined Glacier National Park in Montana with Waterton. UNESCO honored Waterton-Glacier as a World Heritage Site (1995) containing two Biosphere Reserves (1976).