Revealing mistake: When all of Rowan's clothes are removed from her frozen body, the outline of a strapless bra can be seen under the metal blanket. It is also seen later when she sits up and the metal blanket slips a little bit. (00:21:15)
Continuity mistake: In the scene where Dr. Grant and the others walk in on the feeding T-Rex, his mouth is slathered in blood. But when the T-Rex is battling the Spinosaurus, its mouth is clean.
Continuity mistake: When Campbell is in the basement, he drops a book of matches. They fall all over the floor, but in the next shot they change their position and lay in a neat little formation. (00:55:30)
Visible crew/equipment: When Ardeth, Rick and Evie arrive at the first city where Imhotep took their son, Evie is walking through the hall where she had the vision of fighting with Anuk-Sun-Amun in her previous life. As she's walking past/behind a column, you can see someone's head and shoulder poking out from the back side of the column. (01:14:57)
Visible crew/equipment: When Scott is finally killed by the giant scorpion, the hand of the puppeteer is seen on the left.