Monhegan Island, Maine
This tiny island off the coast of Maine is less than a mile long, has no paved roads and is home to about 60 residents. The only way onto the island is via boat or ferry, and once you arrive, you won’t only be leaving your car behind — cellphone service is iffy and Wi-Fi is nonexistent. However, Monhegan Island boasts miles of hiking trails, plentiful birding opportunities and an artists’ colony. Plus, it’s home to many rare plants and flowers. Because the island is so remote, there’s a limited chance for reseeding by winds or birds, and some species are in danger of dying out.