Originally built in 1911, these locks offer a fascinating lesson in technology from days gone by. Observe ships and sailing vessels as they enter the locks and – following a series of mechanical adjustments – depart into either the sound or the lake at a completely different water level. You can learn all about the locks' history in the visitor center; from March to November, guided tours are also offered. In addition, visitors may look through a viewing glass to see salmon run from fresh to salt water in season (June through October and March through April). Also, be sure not to miss the seven-acre Carl English Botanical Gardens, which present nearly 2,000 varieties of plant life.