Great place! Our favorite hotel, The Proud Karon, was very close by and we were lucky enough to walk here every day. The only danger is that looking at the athletic people in this place, you start running yourself! Just an oasis of coolness in hot weather. There are shops and cafes nearby, you can take a coffee and take a leisurely walk. The water in the lake is sometimes dirty, but at such moments you can admire the trees and flowers.
A beautiful lake or pond, next to the sea shore, surrounded by a green alley, is a good place for walking, especially in the evenings when the heat of the day subsides. There are several good restaurants nearby with verandas offering a pleasant view of the reservoir. There is also an observation deck for photos. I'm posting a couple.