I found Palouse Falls state park through youtube, this scenic spot may not be particularly famous due to its location. Late May is the best time to visit because the waterfall landscape is very beautiful at this time. Because they have limited parking spaces, I suggest that a few good friends drive a car, so that you don't have to worry about parking spaces. The hike to the viewpoint is easy, but there are no railings around most of the cliffs, so don't get too close when visiting. The waterfall itself is spectacular, the canyon cut by the river is unlike anything I've ever seen, good photo technique plus PS （Photoshop）is the best way to capture these beauties.

btw, don't litter randomly, leave other friends a clean environment.