The Smithsonian National Postal Museum is devoted to the colorful and engaging history of the nation’s mail service and showcases the largest and most comprehensive collection of stamps and philatelic material in the world
The Basilica of the National Shrine of the Immaculate Conception is the largest Roman Catholic church in the United States and North America, and is one of the ten largest churches in the world
The German-American Heritage Museum is the only national museum to celebrate, display, and commend the achievements of immigrants who came from German-speaking countries and achieved the American dream
