East Tennessee Grotto (ETG) is located in the Knoxville / Oak Ridge area of East Tennessee. ETG, established in 1956, is one of the older grottos of the National Speleological Society (NSS) . ETG welcomes people who are interested in becoming responsible cavers. We hold our meeting on the first Wednesday of each month (7:00pm) at Cherokee Caverns in Knoxville Tennessee. Our mailing address is PO Box 4802, Oak Ridge, TN, 37831.