Fodor's Expert Review Fort Columbia Historical State Park

This 618-acre park, part of the Lewis and Clark National Historical Park, blends so well into a rocky knob overlooking the river that it's all but invisible from land or water (U.S. 101 passes underneath, via a tunnel). The turn-of-the-20th-century military buildings offer great views of the river's mouth. In spring the slopes are fragrant with wildflowers, and there are 2 miles of hiking trails to explore the grounds. The interpretive center has displays on barracks life and Chinook Indian culture. Two historic buildings on the property are available for overnight rentals.