The stone jail where Gulliver is imprisoned is modeled after a natural formation of volcanic origin in the northeast coast of Northern Ireland, consisting of over 40000 interlocking basalt columns of distinctive shape. Quite appropriately, its local Irish name, "Clochan an Aifir", means "The Giant's Causeway".
Rob Letterman felt it was important for "Jack Black to interact with the other cast members, and for those interactions to feel natural - as if they all really were in the same room". Thus, thanks to the use of the DualMoCo camera, which was used extensively for the first time on this film, while Jack Black was in one area of the sound stage, performing against a green screen, the actors portraying the Lilliputians would be on another part of the stage, acting "opposite" Jack Black.
The film makes numerous references to the Star Wars franchise. Several of the film's crew worked on the Star Wars prequel trilogy, notably cinematographer David Tattersall and production designer Gavin Bocquet.
With a $6,000,000 opening weekend, this was the lowest opening for a 3D feature released in over 2000 theaters since My Soul to Take (2010). It only held that accolade for two months however with the subsequent release of Drive Angry (2011).
Although critics and audiences disliked it for being too gross and childish, the part when Gulliver saves the King from the fire in the palace by putting it out with urine is actually taken directly from Jonathan Swift's book. However, in the original novel the person rescued in this manner is the Queen.
The trivia items below may give away important plot points.
The text in the "newspapers" in the end credits is actual text from the original novel by Jonathan Swift, and mentions some adventures that are not featured in the movie but featured in the original, like the encounters with the subhuman "yahoos".