Parents Guide for
Journey to the Center of the Earth (2008) More at IMDbPro »

Two kisses.

Frequent action violence. The characters are frequently threatened with harm from dangerous plants, animals and other perils. The characters have to fight and harm carnivorous fish and plants. Dangerous creatures attack each other. No violence directed at other people. The only gore is dinosaur spit.

While there is no profanity in the movie that I recall, there is a brief exchange between two characters discussing rock formations, while it's obvious to adults and older children what word shist is being confused with, it will go over any younger child's head. See the "memorable quotes" section for the dialog.

None.

Well, yes. Nearly all scenes are intense and might be frightening, especially to young children. This movie was designed for 3D so there is an emphasis on surprise and things jumping out at you. Even when seen in regular format, these scenes are very intense and are intended to fright the audience, young or old.