Factual error: A girl is playing with a Tamagotchi virtual pet in the scene set in 1994, but the toy was not released in Japan until 1996 (it wasn't officially available in the USA until May 1997).
Factual error: Near the beginning when the boat pulls up and the guy on the boat tells the blond convict he's got a beauty 13 foot "Tiger shark" that's up in some sort of sling, the so called tiger shark is actually the same robot mako shark from the rest of the movie, just with stripes on it. Tiger sharks have a blunt rounded nose, not a pointed one like a great white. (00:07:35)
Factual error: In the gunfight on the Nile-boat, you can often see (and hear) Rick fire his revolvers 20-24 times in totum without reloading. The guns he has would only take 6 rounds per gun (MAS 1873 revolvers).
Factual error: The priest says that St. John saw the number 666 in his vision, but it was actually 999 inverted. St. John wouldn't read modern Arabic numerals like we do, it would be Roman numerals. The number 666 would actually be DCLXVI. (01:05:40)
Factual error: In the scene where the cast find the guns in the tiny coffins, they mention that it is not possible to tell if they are loaded because the clips are welded. Being semi-automatic pistols, simply pulling back the slide & ejecting the first round would have easily determined whether live or blank rounds had been loaded.
Factual error: When Sheriff Emmett Kimsey (Lou Diamond Phillips) and Dr. Sheila Casper (Dina Meyer) enter the mine shaft and fall down into the cavern full of guano, they light a flare. The flame would have caused the fumes to ignite.
Factual error: In Sintra, when Depp and the girl go to Fargas' house in the morning, they ride the motorbike and turn left. However, from Hotel Central to this house you must turn right, it's the road that climbs to the manors, the other way you'll get to Central Village.
Factual error: Whenever one or more of the mutated, super venomous snakes attack someone, you can hear a rattling sound because they evolved from rattle snakes. However, it frequently shows the tips of the snakes tails, and they are completely bare. How can they constantly make that noise if they don't have rattles?
Factual error: The film takes place around 1830, but you can see a character using a Colt Navy 1851, which was made 21 years later actually.
Factual error: The Crane mansion is supposed to be set above the village of Concord as listed in the ledgers, however, Nell answers an ad directing her to the Berkshires which are nowhere near Concord.
Factual error: Grizzly bears are not present as far East as Maine and therefore would not have been anywhere near Lake Placid.
Factual error: When the bloke's head gets cut off in the beginning by the circular saw blade being thrown, surely there would be more blood, like when his mom got killed under the bed?
Factual error: At the very end of the movie, Ichabod addresses to Young Masbath saying the final line "You'll son find your bearings young Masbath. The Bronx is up, the Battery is down and home is this way." However the Bronx was instituted only in 1898, a century later.
Suggested correction: 1. The Bronx was established in 1639, along the Bronx river by Dutch settlers, they started using the name Bronx. It doesn't have to be part of New York City for Ichabod to mention the location of the Bronx. There was already 2 bridges to it from Manhattan island even. 2. He could be simply referring to the Bronx river.
Factual error: Near the start, the letter received from Brazil has a stamp with Brazil written with a Z, but stamps spell it Brasil, with an S. (00:08:35)