(This isn’t exactly a spoiler alert, but if you’re not interested in some speculating about the plot of National Treasure: Book of Secrets, turn back now. Or the story gremlins will get you.)

A while back I was speculating about the plot for National Treasure: Book of Secrets. Actually, as far as plot forecasting goes, it was pretty lousy. I only suggested that the climax of the film would happen at Mount Rushmore – something that location scouts hinted at way back in March. And just a couple weeks ago, the celebrity blog on USA Today said the same thing in a recap on a press conference where Nicolas Cage was discussing the film. At this point, it seems a foregone conclusion that Rushmore is where the action in the movie wraps up.

That makes sense from a purely chronological perspective, since Rushmore is probably the newest monument we’ve seen show up in the movie trailers. Borglum sculpted Mount Rushmore from 1927 to 1941, and some portions of the mountain – like the Hall of Records, the tunnel behind the heads that seems to be where some of the action is going to happen – weren’t finished until the 1990s.

Of course, if you’re really itching to know more about the plot before the films comes out this week, your best source is probably the official National Treasure website. They’ve got a set of pretty impressive games based on locations featured in the movie, and the details in the games are pretty revealing. New locations – each with a puzzle and an arcade game – have been coming online every week. Mount Rushmore is the final location, and it should be online in… well, about 5 minutes if they’re on Eastern Time. Check it out if you want some sneak peaks.