Other mistake: When Nate and Sully first meet Chloe in Barcelona, Chloe steals the cross from Nate. In none of the shots is Chloe's arm reaching anywhere. And the backpack never appears to be jostled. (00:33:45)
Visible crew/equipment: Cut tennis balls are seen on the bottom left corner through a cargo net when Tom Holland is first exploring the ship. (01:27:32)
Continuity mistake: In the fight scene on the boat in the air - the cabin door is smashed in by Sully and "bad guy", but a shot later, Nate slams into the reappeared cabin door which is not smashed. (01:33:51)
Deliberate mistake: The baddies somehow manage to place the net under the two humongous ships by simply digging with their shovels in a matter of minutes, when they would need a bulldozer and several hours instead.
Factual error: The Skycrane helicopters have a max takeoff weight of 42,000 lbs. With them weighing in at 19,200 lbs, that leaves 22,800 lbs that they could lift. Even small carracks, the ships, weigh around 180,000 lbs.
Continuity mistake: When Chloe, Nate, and Sully rest and talk about wine, Sully holds the glass differently between shots. One shot it's by the stem another by the foot/base.
Plot hole: Sam sent a post card from the church where the keys are used. But Sam was captured moments after locating the book that gives the clue about the church, and would never have had a chance to go there.
Deliberate mistake: The whole airplane scene with the heavy cargo flying away and hitting the heroes without harming them plus them jumping and standing on the flying cargo defies the laws of gravity, physics and common sense.
Plot hole: The hero had to dive to get in to the cave where the wrecks are but the baddies can just drive in with their boats.
Suggested correction: You hear explosions prior to Nate and Sully looking out to see their boats; they've blasted their way in.
Factual error: Chloe and Nathan use a GPS tracker in their phone while Sully is above them searching for key holes. They're both able to stay together due to this. The problem is Chloe and Nate are underground. GPS uses satellites and they wouldn't work underground.
Factual error: Nate and the other chick find four amphoras full of salt inside an ancient Roman storage room underneath Barcelona's streets. When they burst, the salt is released and spilt everywhere. Salt is a very hygroscopic mineral. It is impossible for that salt stored underneath the city's streets in a non-sealed container to not be one giant block of wet, melted solid after 500 years of humidity. It happens to kitchen salt if not stored in a dry place, let alone salt from the 16th century.
Plot hole: There's no way more or all of the passages/rooms going out from beneath the church had been discovered as the surroundings has gone through examination and conservation throughout the years.
Other mistake: Sully climbs up the helicopter chain in the final scene with a bag full of gold. Assuming modest dimensions of 30x30x30 cm for his backpack, that means that he was carrying at least 40 kilograms of gold on his back, but he tosses it around like it's full of fluff. And when he hits Braddock in the face with it later, he's tossing 40 kilos of gold at high velocity at her face, but she shows up later without a scratch.
Continuity mistake: When Sam leaves Nate at the orphanage, there's an orange lamp to the right side of the window emitting light on Sam's face. As it's on the right of Sam, the right side of his face should be lit orange; however, in the cut to the close-up, the orange light is on the left of Sam's face. This is likely due to the editor flipping the shot in post.
Other mistake: Sully jumps off the plane with the map but somehow Nate and Chloe end up with it.
Factual error: When Jo kills Santiago by slitting his throat, there is only a trickle of blood. He should be covered in it. This was probably done to keep the PG-13 rating.
Factual error: When they were in the underground chamber and it was filling up with water. Nate is still talking to Sully through his phone app, despite his phone being in his pocket which would make the call so muffled as to be inaudible.
Suggested correction: Nate was talking through the device in his ear, the issue with the phone is it breaking since it was submerged in water. The Bluetooth piece in Nate's ear is how he was communicating, not the Phone GPS App.
Factual error: When Nathan and Chloe are freefalling from the plane, they're able to communicate with each other. This is physically impossible. They're probably falling at a speed of 120 mph a second, which would literally suck the air from your lungs if you tried talking at the altitude they fell out of the plane from.
Other mistake: There's actually no need for two people in order to get to the chamber with the huge urns. You could easily just pry open the grate by the fountain, rappel down and bust through the final door by some means (or have both of the keys).
Plot hole: Nate did not have his postcards from his brother with him when he got out of the car on the plane and certainly not when he was jettisoned from the plane. If the answer to this they were in his pockets, the falling from the plane, fighting, and being in the sea would have meant they were mangled, lost or extremely wet and mainly destroyed. Yet he and Chloe have them along with the map that Sully exited the plane with (another mistake someone else mentioned), as if they had arrived yesterday.
