In the following image:

Do you see the water in a few feet radius around a land? How do you describe this? Let's assume that the land is a park and there is no fountain. Can I express it this way:
A water circle of few radius is around the park.
I'm not sure if that sentence is grammatically and logically correct.
Or can I say it this way:
The park is surrounded by a circle of water having few feet radius.

