They're beautiful, fun to find and the whole family can mine for them at the Herkimer Diamond Mines, part of this KOA. Actually quartz crystals, the stones were faceted by nature half a billion years ago. Here, experience Upstate New York's largest jewelry store, museum, a fossil-and-gemstone sluicing area, "Randy" the authentic dinosaur skull and a new activity center. Stay in themed cottages and lodges (solar-powered, astronomy, robotics and more!). Enjoy a canal boat ride with Lil' Diamond III at the Herkimer Marina. Go through a lock that lifts you up and down 20 feet on the Erie Canal. Cherish your heroes at Cooperstown's Baseball Hall of Fame. Alongside KOA's campsites, West Canada Creek offers trout and fun for canoeists, tubers and kayakers. Dine at KOA's on-site cafe, pavilion or restaurant. Join in the many activities during Herkimer Diamond Mines' 61st anniversary. Pool: Memorial Weekend - Labor Day Weekend. Max pull thru: 100 feet.