Every November, the world's largest congregation of bald eagles gathers 20 miles outside of Haines, Alaska, for an unusually large feast. The draw? Meaty, striped salmon spawning along the Chilkat River, which never freezes thanks to an upwelling of warm water from underground springs. the late-fall run attracts more than 3,000 eagles--and hundreds of amateur ornithologists. The latter converge on the annual Alaska Bald Eagle Festival for ranger-led tours, workshops with wildlife photographers, and, or course, the sight of thousands of birds diving into blue waters in an otherwise snowy landscape. This year's festival takes place November 10-16.