The Small Waterfall Visa Gift Card may cause you to wonder where all the water keeps coming from. We learn the water cycle in grade school, with rain and snow filling rivers, lakes, oceans, and then evaporating to start the process all over again. This waterfall appears to be supplied by ground water flowing back to the surface. To keep flowing endlessly requires a lot of water, but when you consider how big an area a river valley draws from (12 states for the Ohio River) the sustainable nature of flowing water is more comprehensible. People who love waterfalls and outdoor activity will like getting Small Waterfall Visa Gift Cards.