10 Island Destinations Within the US Reachable Without a Passport

7. Catalina Island, California: Mediterranean Charm Off the California Coast

Santa Catalina Island, located just 22 miles off the coast of Southern California, offers visitors a unique Mediterranean-style island experience complete with crystal-clear waters, rugged mountain terrain, and the charming resort town of Avalon that feels transported from the French Riviera. This remarkable destination has been carefully preserved through the efforts of the Catalina Island Conservancy, which protects 88% of the island's 76 square miles, ensuring that visitors can experience pristine wilderness areas alongside developed tourist amenities. Avalon, the island's main town, enchants visitors with its art deco architecture, palm-lined waterfront, and the iconic Catalina Casino, a magnificent 1929 ballroom and movie theater that has never been used for gambling despite its name. The town offers excellent restaurants, unique shopping opportunities, and a variety of accommodations ranging from historic hotels to modern resorts, all within walking distance of beautiful beaches and the bustling harbor filled with pleasure boats and the ferry terminals connecting the island to the mainland. Beyond Avalon, Catalina Island reveals dramatic landscapes including the rugged interior accessible through eco-adventure tours, zip-lining experiences, and hiking trails that lead to spectacular viewpoints overlooking the Pacific Ocean and the California coastline. The island's clear waters provide exceptional opportunities for snorkeling, scuba diving, and underwater activities, with the protected marine environment supporting abundant sea life including bright orange Garibaldi fish, sea lions, and occasional dolphin encounters. Two Harbors, a smaller settlement on the island's west end, offers a more rustic experience with camping opportunities, secluded beaches, and access to some of the island's most pristine wilderness areas.