After that third or fourth bong toke, who wouldn't feel like gliding alongside a giant manta ray under the waters off the Baja peninsula? Or maybe you'd rather spelunk the crevices of the Grand Canyon and the schisms of Greenland's glaciers. But you're too lazy, you say? Afraid of jellyfish? Claustrophobic? That's the sweet part. You don't even have to get out of your chair! The $10 admission to IMAX is probably cheaper than that pizza you're fantasizing about. And the movie screen, no joke, is five stories high. Dude.