11. Channel Islands National Park, California
Channel Islands is a peaceful escape just off the coast of Southern California. This park is made up of five rugged islands that feel like a world away from city life. To visit, you’ll need to take a boat or small plane, but the journey is part of the fun. Once you arrive, you can hike along scenic cliffs, explore sea caves, or snorkel in clear waters filled with marine life. Each island has its own charm, with different trails, beaches, and wildlife. Sea lions, dolphins, and even island foxes are common sights. There are no shops or restaurants, so visitors should bring their own supplies. That sense of solitude is what makes it special. And like all the national parks without entrance fees, it is free to enjoy the views, hikes, and coastline.