13. Galveston Island
This Texas paradise features 32 miles of stunning beaches, restaurants, nightlife, museums, and more. With so many options for golfing, fishing, and spas, there's plenty of ways to relax. One major attraction is Moody Gardens, an accessibly designed, pyramid-dotted 242 (!) acres containing botanical gardens, aquarium, amusement park, hotel, fine dining and more. Use the discount senior passes offered on Tuesdays to book private penguin, seal, and river otter encounters.