Glencarlyn Park Playground

If you live anywhere near South Arlington, this is probably already your go-to spot — and for good reason. The playground covers the full 2-12 age range well, with climbing structures, slides, swings, a seesaw, and a sandbox that younger kids absolutely destroy in the best way. There’s a water feature that saves everyone on a hot summer afternoon, and the shade trees actually do their job instead of just looking decorative. Pack a cooler, because the BBQ and picnic tables make it easy to stay for hours. The walking and bike paths tie the whole place together if you want to burn off some energy before or after the playground chaos.