Here's a pretty cool one I got a while back in Antelope Canyon which is near Page in Arizona. In order to get this effect, sand was thrown up into the light, but it's still pretty neat in my opinion once you realize that, heh. Also the colors aren't nearly that red in person, but when you take a low exposure it really brings out a lot of the color that our eyes don't really pick up.
This was taken on a 35mm rebel, can't remember the exact settings, but if you google how to film in slot canyons I'm sure you'll find it. Hope you enjoy!
