The Town of Rosebud, NV. Also Indian burial grounds, adobe ruins and a thousand pottery shards.
Old logging evidence in the Sierras includes 5 foot cross-cut buck saws, old railroad beds, cables, and many handmade draft horse and mule shoes.
Lots of sheepherder camps, mostly just good trash dumps, but sometimes old wood stoves, and buildings.
Mine trash including, buildings, stamp mills, crushers, head rigs, ore carts, trammels, wooden waterlines, hand tools, and old bottles.
In Arizona, dinosaur tracks, and Anasazi artifacts like bows and arrows, and intact pottery.