The Ballard Locks are a great place to go in order to understand the importance of Seattle as a port city. The Locks are often called the “gateway to Seattle,” and for good reason. They provide the link between the salt water of Puget Sound with Seattle’s fresh water, which is found in the city’s two major lakes: Lake Washington, and Lake Union. The lock system was built in the early 1900’s, and is a crucial element in the passage of ships between salt and fresh water. It also helps keep the water supply of the city clean. Many ships do come through this system to make their way into Ballard’s industrial area, and visitors can stand right up close as they go by. During the summer, you can also see right into the water as salmon travel through the manmade ladder built for them at the Locks. Sometimes, you might see a sea lion, but the staff tries to keep these animals away from the fish. In the height of the season, you’ll see Chinook and Coho salmon thrashing in the ladder as they make their journey. This process is explained by a friendly staff, and at an informative visitor center. The Locks are surrounded by absolutely beautiful and well kept grounds. A walk along the brick paths through the Locks garden is a refreshing way to spend a few hours. Make sure to see the gorgeous Carl S. English Jr. Botanical Gardens. If you are interested in trains, a lofted railroad bridge passes just past the locks, and right over the canal. The locks are a great place to enjoy an outdoor picnic, and to spend the day watching Seattle’s maritime importance in action.