Tumwater Historical Park is the sister park to Tumwater Falls Park, which was my new place of the day on October 17, 2010 (see http://blog.firsttries.com/?p=1407)
This park, which is situated on the Deschutes River, features a wonderful view of the now defunct Olympia Brewing Company. The park is listed on the National Register of Historic Places. In addition to the lovely setting, there are big toys for the kids and restrooms. Of note is a sign that says the lake is closed because of the New Zealand Mud snails, an invasive species. The City of Tumwater is attempting to quarantine Capital Lake and this lower part of the Deschutes River to stop the spread of the snails.