White Sands National Monument: This was great! Most of the book can be completed in the visitor center (using the video & displays) and then there are a few that include hikes and being out on the dunes. There are 3 different levels with varying requirements but for my 8, 6, and 3 year old it was definitely do-able. Don’t forget to get your sled from the gift shop and go “sanding”!
Silver City, NM - Gila National Forest, the first parcel set aside as protected wilderness by the U.S. Forest Service in 1924, is remote and enormous (it's slightly larger than Connecticut). But make the effort to visit, and you'll be rewarded with some of the Southwest's best hiking and camping, plus a chance to view the ancient Gila Cliff Dwellings National Monument, and to tour several ghost towns.