On April 23, 1972, Apollo 16 astronaut Charlie Duke took his third and final jaunt on the moon. He and fellow astronaut John Young took the Lunar Rover exploring in the Descartes Highlands, and while they were there, Duke left a token on the surface of the Moon — a portrait of his family.

I wonder if someday someone will find it.

Other weird things sent into outer space:

http://io9.com/5983659/the-weirdest-and-most-unbelievable-things-that-humans-have-sent-into-space