The sixth largest cathedral in the world, built in the Gothic style at one of the highest points in Washington, D.C., the Cathedral is a national house of prayer for all people. Offering public tours and worship services, the Cathedral provides inspiration and tranquility in its architecture, gardens, music and programs. Massachusetts and Wisconsin Aves, NW, Washington , DC, 20016-5098. (202) 537-6200. www.cathedral.org/cathedral