My hotel was near Lake Union and the path near the lake was perfect for early morning walks. I also explored the Center for Wooden Boats which is located on the lake. I would have gone to the Museum of History and Industry, but ran out of time.
The Center for Wooden Boats is like a museum for boats, but they also believe in teaching through direct experience which I think is pretty awesome. They offer boat rentals – sailboat, canoe, rowboats, and pedal boats – by the hour. If I lived in the area I would love to take woodworking, sailing, and boat making classes. They also offer free boat rides on Sundays. Viewing the boats along the docks at Lake Union was a perfect rainy morning excursion.