Brackett's Landing (north side) is a great park, located just west of downtown Edmonds and north of the Edmonds Ferry dock at Main St. & Railroad Ave. (GPS: 47.8138° N 122.3824° W)
The sandy beach is a great place for kids. The highlight of this park is the underwater area. Divers will find a complete "city" layed out here. There is a fresh-water shower where divers can rinse off after exiting the water. For non-divers, it's interesting to watch the divers gearing up and entering and leaving the water.
The photo below was taken from Sunset Drive, looking over Brackett's Landing Park and the Edmonds Ferry Terminal toward the Olympic Mountains.
7th & Elm Park Locator Map