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April 10, 2021 Our last few days at Horse Cave KOA took us into town to visit the Hidden River Cave in downtown Horse Cave, Kentucky. This cave has two subterranean rivers flowing over one hundred feet below ground. It also has the world's longest underground swinging bridge taking you up into the Sunset Dome, one of the largest free-standing cave domes in the United States. It is 100 feet high and 250 feet across. This cave once supplied the city with water via a hydroelectric generating system. It lay 100 feet below ground and there are 230 steps to go down and come back up. This was our campsite for a week at Horse Cave KOA. We think we had the best view in the campground. We could watch the Amish building "tree house" for the campground 20 feet in the air. They were also clearing a large area of trees for another project. They have 3 of these wagons for rent with a 4th coming. This "tree house" was framed and windows in this week and they started on a se...