The Smithsonian just released 2.8 million free digital images of its collection in an 'unprecedented' move. Here are some the most iconic.

1. The Lockheed Vega 5B that Amelia Earhart flew across both the Atlantic and the United States.

2. Muhammad Ali's boxing headgear.

3. A proof of the 1765 Stamp Act, part of the lead-up to the American Revolution and one of only 32 in the world.

4. The plane the Wright brothers first flew for only 12 seconds in 1903

5. Certainly less well-known than other entries on this list, this "Natural Creeping Baby Doll" was patented in 1871.

6. The Mercury Friendship 7 Capsule, the vehicle John Glenn used to became the first American to orbit the Earth.

7. The Peacock Room from a Victorian London estate can take you back in time.

8. The command module from Apollo 11, the mission that led to the first humans on the moon

9. A digital reconstruction of the Cassiopeia A supernova from the Hubble Space Telescope.

10. Photographs from the alcoholic specimen room at the National Museum.