License: This is licensed for commercial or non-commercial use.
8 photographic backgrounds in jpg format, and at 180 dpi. They are 2848 x 2143 pixels (6.1 megapixels). Photos were taken 2012 with a Kodak EasyShare C613. Whole packet is a little over 5 Mb and was created with Photoshop on a PC.
Black Chief Mine is on the route called "Mountain Loop Highway" into the Cascade Mountains in Washington state. It's near the Red Bridge Campground.
No, I didn't go in more than maybe 40 feet. Claustrophobia and common sense. Besides, no flashlight with me and mines are notorious for having vertical shafts very suddenly.