This is the Esplanade, in progress along Downtown Tacoma's Waterfront. For orientation, I-5 is located between the Tacoma Dome and the hill in the background. I live on that hill, just back from the edge, to the right of what's visible, but still within the boundaries of the frame. This Esplanade/Trail is a work in progress, maybe half a mile at best right now. I'd definitely recommend a bit of exploration, in combination with a visit to Chihuly's Museum of Glass - or a shorter walk near the Foss Waterway Seaport, to the North.
Signs are good for this project to be completed, hopefully some day leading to within a block or two of my house, in future phases.
Click through for a couple more pics.