Mukilteo Lighthouse Park is worth a visit when in central Mukilteo. Hotels.com travelers also say the area is full of friendly people and has lots of nice beaches. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
If a restful vacation is part of your travel plans, Beach Camp at Sunset Bay might be the perfect place to seek out during your trip to Edmonds. Discover the sunsets while you're in the area.