Is there a park (or similar place to walk around )near On Nut?

Thanks

I think due to the lack of responses would indicate a big no unfortunately! As far as I'm aware the nearest parks to the On Nut area are Suan Luang Rama 9 park, this is behind Paradise Park (a shopping centre not a park!) on Srinakarin Rd. Along the bts there is Benjarsi next to Emporium and a bigger and quieter park is the Benjakiti Park, a 5 minute walk from Asoke bts. Personally I quite like this park due it's size and it doesn't feel like you're in the centre of Bkk.

Nope but you can just take the train down a couple of stops, or if even the bus to get you to even more parks around Bangkok!