Urban explorers can take their pick of seven state parks, three national parks and preserves, and some 400 parks and gardens, all within a half-hour drive of downtown. Once you’ve browsed Jax’s art museums and visited the Fort Caroline National Memorial, check into an RV park along the St. Johns River, pitch your tent on the beach at Little Talbot Island State Park, or kayak around the wetlands in the Timucuan Ecological and Historic Preserve.