Coo! I see a sign that says "Rainier View Aquatic Center," which points me toward the Pacific Northwest of the United States. The architecture and the general look of the area are very characteristic of suburban Washington state. The road markings and the style of the buildings confirm a North American setting. I am quite confident this is in the Seattle area.

I suspect this is in Seattle, Washington, USA. I am 80% sure.

then: guess