Red Cave Slot is located near Zion NP. It is one of the best slot canyons in Utah although it is little well known. Although the slot is on BLM land you have to cross private property requiring permission from the land owner. In some ways it is similar to Antelope Canyon but the light and quality of sandstone isn't as nice. It would be best to be in the slot on a sunny mid-day during the summer. My Dad and I were there in very late October and I suspect that that affected the light quality somewhat. This is a neat area for photographers.
All images taken with a Digital Rebel XT with various L lenses.