Apollo 12 is in some ways a forgotten mission: sandwiched between the triumph of 11 and the near-disaster of 13, it still accomplished some amazing goals. Chief among them was pinpoint precision in its landing: NASA wanted them near enough to the Surveyor III robotic lander so they could walk to it... and this picture shows how well they did.
The Apollo 12 astronauts did in fact walk over to Surveyor. They were also able to remove some of its parts to return to Earth for study as well.
I have a wine label made in honor of Apollo 12, showing astronaut Al Bean holding a glass of wine. Years ago I got him to sign it, and it's one of my most cherished mementos.
Original post: LRO spots Apollo 12 footsteps