* The Apollo missions: The last Apollo mission, Apollo 17, landed on the Moon in December 1972. So, the last time humans saw the Moon from an Apollo spacecraft was in December 1972.

* The Apollo spacecraft themselves: Most of the Apollo spacecraft are still in orbit around the Sun, though some parts of the spacecraft have re-entered the Earth's atmosphere and burned up.

* The Apollo 11 lunar module: The descent stage of the Apollo 11 lunar module is still sitting on the surface of the Moon. While we can't directly "see" it, we can image it using powerful telescopes and orbiting spacecraft.

So, depending on what you are asking, the last time we "saw" something from the Apollo missions was either in December 1972 or more recently via telescopes and orbital images.