If you’ve driven this far north, you might as well take a little time out of your day to visit the Battery Point Lighthouse in Crescent City. The operational lighthouse, built in 1856, is on a small island off the foot of A Street, and is accessible on foot only at low tide (you have to cross a tide pool to get there, which adds a bit of adventure). It houses a museum with exhibits on the coast’s history and the original Fresnel lens, and guided tours of the lighthouse and the light-keeper's living quarters are offered Saturdays and Sundays from 10am to 4pm, tides permitting, April through September (call ahead to see what the tides are up to). It’s located at the foot of A Street; for more information call 707/464-3089.