Silver Falls State Park is the standout nature excursion from Salem, famous for the Trail of Ten Falls and several waterfalls where the path passes behind the falling water. The combination of forest, basalt cliffs, and repeated cascades makes it feel much more dramatic than its easy road access suggests.
Go with real walking time, not just a quick viewpoint mindset. The full loop is the classic experience, but shorter segments still deliver strong scenery; in wet months, expect mud, spray, and slippery sections around the falls.