An Indiana man sketched a backyard pool on a napkin after a 1.5-year installation wait; two years later it became a 60,000-gallon private water park now renting for $140 an hour
Pic credit: Swimply/ Mandy Plenty of people dream about a backyard pool. Cory Johnson built a water park. On the east side of Lake Wawasee in Cromwell, his home shares its grounds with a 60,000-gallon private retreat that has waterfalls, a slide, a zip line and real palm tree trunks. Then he rents it out…