One of the famous sights of Zion National Park is the series of Emerald Pools. This picture shows the waterfall which flows from the Middle Emerald Pool into the lower one from almost underneath the falls.
Every National Park has its own distinct features and geography. While Joshua Tree is mostly known for its namesake tree and desert landscapes, it also has great rock climbing opportunities. Here is an abstract nature wallpaper with grey and tan streaks in the rock.