1. Yellowstone, WY
No other place on earth is like Yellowstone National Park. The massive, natural sanctuary (3,471 square miles of green!) mesmerizes all visitors with its mountains, canyons, geysers and subalpine forests (and don’t be surprised if you spot buffalo). With challenging hikes into the backcountry as well as handicap-accessible wooden boardwalks, the wonders of Yellowstone are for everyone. Bring a tent and get here early to take advantage of the affordable campgrounds (seven are first-come, first-served and five require reservations). Pack the car with a cooler of campfire meals and snacks to get you through the weekend.