Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
I'm including this here because everybody always refers to the original King Kong fighting a giant snake, and in later movies he does fight a snake, but in the 1933 movie it isn't really a snake since it has four small legs. Animals on Skull Island are from the dinosaur era, so maybe it's supposed to be a dinosaur or a snake before evolution did away with the legs, but that still makes it a lizard, not a snake, even though it moves like a snake and we don't see it use its legs which are barely visible. It could even be some kind of salamander. Regardless of whatever it's supposed to be, it's a classic movie and a great fight between two behemoths, even though the special effects are primitive - or maybe because they are.
Here's a colorized YouTube clip, but you should really watch the black-and-white version.