Heh, I was curious the other night and watched some of the movie “10,000 B.C.” because I was curious to see how they portrayed Mammoths and Sabertooth Tigers, and the movie was one of those that was so laughably bad that it bordered on being funny!
Needless to say, I ended up just fast forwarding through it to see their portrayals of the fauna, but...not worth the calories even for that!
One other classic in that genre (movies about prehistoric times that are abominably bad) is 1950’s “Prehistoric Women” with Laurette Luez.
Try “1,000,000 B.C.”, starring Ringo Starr and Raquel Welch. That one was hilarious, and Raquel is always worth watching.