The Gaylord National Resort & Convention Center, with 2,000 rooms, is the largest hotel between New Jersey and Florida, and the largest in the Washington, D.C. area. Located at the National Harbor in Oxon Hill, Maryland. National Harbor is a development just south of Washington, D.C. near the Woodrow Wilson Bridge. It originated as a 300-acre multi-use waterfront development. Photo by Carol Highsmith, 2018.