Are you across the street from the old Ledo's Pizza?
Hi. No, that's a different pool, but it does have a giant dolphin on it and it is close to Adelphi Road, so we can understand your confusion. We're on Riggs Road, East of Adelphi Road. The zip code is formally Hyattsville, but it's surrounded by Adelphi.
Here's a link to the map.
9442 Riggs Road
Hyattsville, MD 20783