The trailer, synopsis, and new images for the adventure-thriller Sanctum have gone online.  The film centers on a group of explorers who are forced to find their way through unexplored underwater caverns in order to reach the surface after a tropical storm blocks off their original exit.  The movie looks like it could be a fun adventure flick.  James Cameron is on board as an executive producer and, unsurprisingly, the film is in 3D.

Hit the jump to check out the trailer, images, and the official synopsis.  The film stars Richard Roxburgh (Moulin Rouge!), Rhys Wakefield (Broken Hill), Ioan Gruffudd (Fantastic Four), Alice Parkinson (The Pacific), and Dan Wyllie (Animal Kingdom).  Sanctum is slated to open on February 4, 2011.

Click over to Apple to see the trailer in HD.

Here's the official synopsis for Sanctum:

The 3-D action-thriller Sanctum, from executive producer James Cameron, follows a team of underwater cave divers on a treacherous expedition to the largest, most beautiful and least accessible cave system on Earth. When a tropical storm forces them deep into the caverns, they must fight raging water, deadly terrain and creeping panic as they search for an unknown escape route to the sea. Master diver Frank McGuire (Richard Roxburgh) has explored the South Pacific's Esa-ala Caves for months. But when his exit is cut off in a flash flood, Frank's team--including 17-year-old son Josh (Rhys Wakefield) and financier Carl Hurley (Ioan Gruffudd)--are forced to radically alter plans. With dwindling supplies, the crew must navigate an underwater labyrinth to make it out. Soon, they are confronted with the unavoidable question: Can they survive, or will they be trapped forever?

Click any of the images below to see them in high-resolution.