Riverside Park and Pools in Wallingford offers outdoor swimming and family fun by the River Thames. The heated lido pool is open for lane swimming and aqua classes from the end of May to the beginning of September, giving you a proper outdoor swim whatever the weather. There's also a splash pad where kids can cool off and play in the water. The site has a campsite if you want to stay over and make a weekend of it. Aqua fitness sessions run regularly in the pool, combining a workout with fresh air. It's a great spot for families looking to swim outdoors, and the riverside setting makes it feel like a bit of an escape without going far.