Rock Island was already a scenic location, and home to the Great Falls when a dam was added to the Caney Fork River in 1916. Although the waterfall you see here is not man-made, it is the direct result of human action, and is nature's response. The creation of the Great Falls Dam, caused the Caney Fork and nearby Collins River to rise. This unexpectadly caused water from the Collins River to dig through the rock (perhaps helped by caves that were already there) to form this waterfall. This "leak" now turns into a 65-to-80 foot segmented cataract. There were early attempts by engineers to plug the hole, but then leaks developed elsewhere. Then, the engineers decided to leave it as is, but still monitor the area to make sure the hill won't collapse. Rock Island was opened as a Tennessee State Park in 1969, and this area is easily accessible by car. (However, the sign pointing to the area seems to be missing often.)