Title says all. For me it would be 20 Million Miles To Earth, a film about a monster from Venus arriving on Earth in Italy. I use "monster" loosely though, as Ymir was as harmless as they come to humans perfectly content to eat sulfur and be alone. Ymir is our monster of the movie and it is simply put a movie about how a harmless alien is made a monster. See, Ymir would love nothing more than to be left alone, but humanity constantly treats him like shit until he snaps and becomes dangerous (and when you've got a fucking pitch fork stuck in your back who can blame him). Perhaps it's time for a reminder that sometimes monsters don't start out that way is the gist of my reasoning.
Edit: Actually, I think this deserves a better justification. While I found it to be an enjoyable movie, 20 Million Miles To Earth never took off like The Beast From 20,000 Fathoms or Jason and the Argonauts did. It's a shame really, because, despite the amount of exposition, the end rampage is a sight to behold and it would be interesting to see how it would look with modern technology and effects. For those who want to see the rampage, here is a link to the whole film, then go to around 1:04:00
http://www.dailymotion.com/video/xlrqcd_20-million-miles-to-earth_shortfilms
Edit: Actually, I think this deserves a better justification. While I found it to be an enjoyable movie, 20 Million Miles To Earth never took off like The Beast From 20,000 Fathoms or Jason and the Argonauts did. It's a shame really, because, despite the amount of exposition, the end rampage is a sight to behold and it would be interesting to see how it would look with modern technology and effects. For those who want to see the rampage, here is a link to the whole film, then go to around 1:04:00
http://www.dailymotion.com/video/xlrqcd_20-million-miles-to-earth_shortfilms