The National Air and Space Museum, located in Washington D.C., is a must-visit point of interest for anyone interested in aviation and space exploration. With over 60,000 artifacts, the museum boasts the largest collection of historic aircraft and spacecraft in the world.

One of the unique things visitors can see at the museum is the Wright brothers' 1903 Wright Flyer, which is the world's first successful powered aircraft. Other notable artifacts include the Apollo 11 command module, the Spirit of St. Louis, and the Lockheed SR-71 Blackbird.

The museum also offers interactive exhibits and activities, such as flight simulators and a planetarium, making it a great destination for families and aviation enthusiasts alike.

In addition to the impressive collection of aircraft and spacecraft, the National Air and Space Museum is also home to a vast archive of photographs, films, and documents related to aviation and space exploration.

Overall, the National Air and Space Museum is a fascinating destination for anyone interested in the history of aviation and space travel. The museum is open every day except for Christmas Day and admission is free.