When Claire, Arnet and the others reach the wooden bridge with the truck, there immediately is a wide shot establishing the bridge and the valley. On top of the bridge, however, we can already see the truck driving on it and Claire waving it along, whereas in the next shot everybody is back at the parked truck.
Arnet's head position repeatedly changes with the camera angle during the hotel bar scene.
Arnet gets up from the hotel bar twice.
In most shots, the high bridge curves to the right. However, in one overhead shot, it curves to the left.
When Claire falls from the bridge, the river is much narrower, deeper, and less muddy than the river shown before.
As of mid 2017, 14 years after the film's release, the Bell-Boeing V-22 Osprey tilt-rotor has not been delivered to the military of any country other than the United States, much less to a rebel group.
The UH-1 Huey helicopter used by President Ramos to flee the palace has a bulkhead with a doorway behind the pilots--features not found in a real Huey.
Military tanks do not have passenger seats.
Reversed close-up shots during the bridge sequence; the truck tire lettering is backwards.
The helicopters and tilt-rotors defy the laws of physics. No rotorcraft can fly through a waterfall, smash through a brick wall, or break apart a stone statue with its rotors and remain airborne. There is little or no rotor downwash when the helicopters hover; in reality, if a heavy dual-rotor helicopter hovered in a cave of the size depicted, nearby bystanders and objects would be blown around, the intense dust storm created by the downwash would fill the cave, and dust ingestion would likely cause the engines to flame out.
Huge crowds of people stand around with blazing torches, yet there is very little smoke.
There are no snow-capped mountains clearly visible from the Zurich airport (this is a post-production CGI embellishment explained in the DVD special features).
The main characters find a young girl in a remote village in a Spanish-speaking country and they address her in English. There is no apparent reason for them to assume that she understands the English language.