More than 30 miles of beaches plus a wealth of cultural and historic institutions make this island a Gulf of Mexico vacation hot spot. If you go, don't forget your walking shoes: With 14 museums and 20 art galleries, plus several historic homes and mansions, there's a lot of ground to cover. Armchair pilots will love the Lone Star Flight Museum and those with more of a nautical interest can check out the Texas Seaport Museum. Families will enjoy the many child-friendly attractions, including Moody Gardens, with its replica of a tropical rain forest. It's easy to get caught up in all the activities, but don't forget to spend some downtime in the sun and on the beach.