This week's free picture

The other end of the Queen's Chamber is plain, as are the side walls. The machine on the wall is an air quality monitor, as the exhalations of thousands of sweaty tourists lead to deposits of minerals that have to be scraped off the Ascending Passage from time to time!

This picture is copyright Kendall K. Down. You may copy it for educational purposes or for use on a website or in a free publication, so long as due credit is given. For commercial use please contact kkdown@diggingsonline.com