From Wikipedia:
Triple Divide Peak (8,020 feet (2,444 m)) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. It is a hydrological apex of the North American continent, where the Great and Laurentian divides meet at the summit of the peak. Thus, all water that falls at this point can flow to the Pacific, Atlantic, or Arctic oceans (when Hudson Bay is considered an Arctic tributary), making the locale (and surrounding Waterton-Glacier International Peace Park) one of the few places on the Earth whose waters feed three oceans.
Looks beautiful, too.
(via reddit)