National Postal Museum (NATIOAL POSTAL MUSEUM) http://www.postalmuseum.si.edu/ Opening hours: Daily 10:00 - 5:30 Ticket-free location is not far from Union Station. The postal museum is very knowledgeable, interesting and visible, and the exhibition is relaxed and lively, suitable for all ages. The exquisite stamp images from all over the world hanging in the door are exciting. The exhibition introduces the origin of stamps. The first stamps were issued in 1847 in the United States. The stamps issued in the United States are sandwiched in a sheet of metal frames, and a version is arranged in a wall. The audience can pull out and enjoy it according to the index and have specific instructions. A male visitor, excited in front of a stamp, let's help take pictures in front of the stamp. The exhibition says that every stamp has a story. Yes, the picture designed has a story, and maybe there is a story when you use the stamp to send a letter. There are also some meaningful first day covers. Displays famous stamp collectors, and dignitaries. The system details the history and operation of the postal system. The carriage sent mail back then, now automatically picked up, and the post boxes of various periods. Several children, with the help of adults, practice scanning barcode sorting parcels, stamping, and experiencing as postal workers. There are many interactive projects, enjoy stamps of various periods on the electronic screen, search for queries, and then summarize their favorite stamps, send mail. You can make stamps and postcards with your own avatar. The three boxes of used stamps on the table, large and small, are busy and small, and there are small envelopes. You can choose to take six of your favorites in small envelopes. We selected stamps from previous Olympic Games and sports themes, including American and foreign ones. There was a girl who focused on picking small square portraits of low-denomination stamps, which were widely issued and many had special significance. The Postal Museum is holding an exhibition "Flying over the Pacific - China Mail Exchange", which tells the story of China-US relations through a unique way of stamps. There are stamps of the Qing Dynasty of China, contemporary stamps such as stamps during the Cultural Revolution. The museum has a post office where postcards can be sent. The museum’s $8 million William Gross-named Stamp Gallery is a favorite spot for collectors.