If your ideal museum day involves iconic aircraft, moon-landing history, early aviation milestones, and children dramatically announcing that they have found a rocket, the Smithsonian National Air and Space Museum is an easy place to start.
Admission is free, but the Washington, D.C. museum currently requires a free timed-entry pass.
Once you're inside, the museum works well as either a highlights stop or a longer visit built around the objects and galleries that matter most to your group.
For many first-time visitors, three especially strong anchors are the 1903 Wright Flyer, the Boeing Milestones of Flight Hall, and Apollo 11's Command Module Columbia in Destination Moon.
From there, the museum opens outward into aviation history, space exploration, technology, design, and the stories behind some of the most recognizable objects in flight history.