Calvert Cliffs in Lusby, Maryland is famed for its little beach, where one can find fossils and shark teeth. It also has a freshwater pond—with fish!
The pond is very easily accessed—drive into the lot, park just pass the restrooms building, and there it is. It is kid-friendly.
I saw panfish (bluegill and sunfish), small rock bass, and largemouth bass in the water. One can fish eith side of the pond, and either standard tackle or fly are usable.
The ivdeo above shows the fish interest in the small, top water flies I chucked. But a small bobber, small hook, and litle wriggling worm will also score fish easily.