Just east of Afton town, at the foot of a rocky mountain in Wyoming, lies one of the world’s most mysterious natural wonders – a rhythmic spring that intermittently stops and starts flowing around every 15 minutes.
Only a few rhythmic springs exist in the world, and Intermittent Spring in Wyoming’s Swift Creek canyon is the largest of them all. As its name suggests, this peculiar spring flows intermittently. You will see a large quantity of water using out of a hole in the mountain and then flowing down forming a large creek for about 15 minutes, and then dry up for another 15 before the cycle starts all over again. The reasons for this intermittent flow are not entirely understood, but scientists have a pretty sound theory.