On this day in 1969 Apollo 11 astronauts Neil Armstrong and Edwin "Buzz" Aldrin landed on the surface of the moon in the Lunar Module Eagle. Mission pilot Michael Collins remained in lunar orbit in the Command Module Columbia.
Armstrong and Aldrin spent 21 hours and 31 minutes on the lunar surface before returning to Columbia. Although Collins' contribution is overshadowed by that of his compatriots, he played a vital role in the success of the mission. Later astronauts would spend over three days on the surface.
I don't think mankind has done anything quite as cool since then.