I also snagged some 66 souvenirs, the 2 thicker chunks came from Kansas, the thinner one came from an abandoned stretch in Oklahoma, this one is thinner, found a washed out area next to the road that went about 10” or so deep, I got the farthest down layer of tar I could get so I know this piece is old! Not sure if I could get into trouble or not, I got them all loose using my hands. Kinda cool is the one piece I grabbed I noticed well after we got home is shaped like a heart ❤️