I have always been fascinated by the fact that humans--in 1969!--landed and walked on the surface of the moon. The idea that they did this with pencil-and-paper calculations and a freaking slide rule is MIND BLOWING to me.
Anyway, there's a website called where you can buy tiny pieces of historic artifacts, and they are selling pieces of the Apollo 11 spacecraft for $69 (the Apollo 11 moon landing mission was in 1969...see what they did there?)!
The pieces are barely larger than the head of a pin, but damn is that cool!