Located just minutes south of Hoback Junction (an approximate 20-minute drive from the town of Jackson) in the gorgeous Snake River Canyon, Astoria boasts five natural hot springs pools, including one dedicated to children only, plus a cold plunge pool. Open year-round, multiple soaking sessions are available daily beginning at 9 a.m. by reservation. Cost: $25 adults, $18 for kids ages 2 to 12; under 24 months are free.