by NicoBritton
Caught the eastbound SW Chief near Maxwell, NM with a very friendly Amtrak engineer: http://www.youtube.com/watch?v=jvWkYGKbMPw
This appears to be just north of the rest area along I-25, an area called Tinaja.
I've photographed from the rest area.
http://www.railpictures.net/viewphoto.php?id=35228
The area to the south, beginning in Shoemaker Canyon north of Watrous and continuing to Las Vegas and Lamy, is far more scenic.