The "Lost River" at 0.8 miles into the Cedar Creek Trail. There is a footbridge here and to the right there is what looks like a cave, with the sound of rushing water coming from it. The opening that looks like a cave is actually an artificial opening that was created during 1812, when workmen from Saltpeter Cave heard the sound of water coming from the ground. A water main was attached to the opening to transport water to machinery that extracted nitrate from Saltpeter Cave. Interestingly, the source and destination of the the underground river known as the Lost River is still not known. #naturalbridge #nature #naturalbridgestatepark #hiking #naturephotography #virginia #naturalbridgeva #travel #waterfall #landscape #naturalbridgevirginia #photography #adventure #kentucky #naturalbridges #roadtrip #hike #redrivergorge #naturelovers #naturalarch #travelphotography #blessed #landscapephotography #happy #explore #usa #mountains #hikingadventures #nationalpark