Highly entertaining tale of an 1890's expedition to the moon and the strange, insect-like civilization they encounter. The movie begins in modern day (1964) with the first lunar landing - and the astronauts soon discover someone beat them there first, after finding a British flag and a piece of paper with a woman's name on it. The information is sent back to Earth and it's discovered a trio of humans went there over sixty years before. The lone survivor, now in a nursing home, recalls what had happened, so the movie is basically one long flashback.
The Ray Harryhausen Dynamation works very well with the insect creatures, making them much more cold and alien. Recommended.