The author went boating on the Wabash River and discovered a sand bar where they stopped and explored. This experience led the author to question how sand bars form in rivers and whether other rivers also contain them. Research revealed that sand bars are deposited by river currents and waves, forming in long patterns. They are usually only visible during low water levels. Many rivers experience erosion on the outside of bends which deposits sediments to create point bars on the inside of bends. Sand bars are a common feature found in various rivers worldwide such as the Colorado and Missouri rivers.