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Photo: Dianoguy, CC BY-SA 4.0 via Wikimedia Commons
Visit the Battery Point Light House, one of the oldest lighthouses on the California coast. Accessible at low-tide. The neighboring Lighthouse Jetty, built to protect the town's harbor from waves, is an intriguing piece of infrastructure, but potentially unsafe to explore as numerous warning signs attest.
Battery Point Light is a lighthouse in Crescent City, California, United States. It is registered as a California Historical Landmark, and is listed on the National Register of Historic Places as "Crescent City Lighthouse".
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Aquarium with multiple exhibits and a sea lion show. Kitsch, but potentially fun.