Under the George Washington Memorial bridge is a huge sculpture shaped as Trolls and is an amazing thing to stop by for pictures. What I did was, took a stroll in this neighborhood and then came to the Fremont Troll. The community garden at the Troll's Knoll neighborhood was an amazing walk as well. Also, there are some great food options in the neighborhood as well.
Great pictures, a great climb, and free entry, this sculpture should be on your list of things to see in Seattle. The only thing to remember is that there aren't much parking spaces, so a walk to this spot is the most preferred means.