Atlantis: The Lost Empire (2001)

An inexperienced young adventurer becomes the key to unraveling an ancient mystery when he joins up with a group of daredevil explorers to find the legendary lost empire of Atlantis. A naive-but-determined museum cartographer Milo Thatch (Michael J. Fox), dreams of completing the quest begun by his late grandfather, a famous explorer. When a journal surfaces, an eccentric billionaire funds an expedition and the action shifts to high gear.