Took a notion to watch Quatermas and the Pit tonight and imho it is one of the finest science fiction/horror films ever made. Good acting, brilliant special effects for the time and they still look pretty good today, nice music as well and the ending where Quatermas and Barbara stand as the music plays, London burns and the credits roll is a powerful ending; as they both look like they have been through hell and back, as they have, within the context of the film.
I would also say imho that this is probably the best film to come out of the Hammer studios as well. If you haven't seen this film then you are in for a treat.
Regards D S D L