Complex sentence: Buffalo National River is the nation's first federally-protected stream and one of America's great natural treasures, the Buffalo River meanders through the heart of the Ozarks in Arkansas for 150 miles before joining the White River.
Split into simpler sentences: Buffalo National River is the US's first federally-protected stream and one of America's great natural treasures. The Buffalo River meanders through the heart of the Ozarks in Arkansas for 150 miles before joining the White River.