J.J. Byrne Playground (Washington Park)
✓ Last confirmed for the 2025 season
Where: 3rd & 4th Sts between 4th & 5th Aves, Park Slope, Brooklyn, New York
When: typically open in warm months (check before visiting)
Hours: typically daylight hours
Cost: free
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A constant hub of Park Slope activity next to the Revolutionary-era Old Stone House, with summer water cannons and splash areas, tunnels, jungle gyms and a gated toddler section serving every age group.