Other Answers (4)

• I love little random stone walls or steps. I found a lot of these in Baltimore, MD. There%26#039;d be stone steps leading into nothing but forest. It was pretty neat and also haunting.
• they could be walls from the American Revolution; there was many skirmishes around the east coast, and in your case, Massachusetts. the only other thing i can think of is the Civil
  War, but i have never heard of any fighting going on in Mass. at that time. google it and see what comes up, if you%26#039;re really curious.
• You might have some history in your area... Massachusetts being one of the earlier colonies. You should consider searching around with a metal detector or something. You could find some historical objects, coins, or tools... etc
• Dr. Jello%26#039;s got it. Pretty wild, isn%26#039;t it? There are more trees and forests in New England than there were 200 years ago.
  
  in fact, at the present rate of Re-forestation, if this trend continues, you%26#039;ll have no place to park your car in 200 years!
  
  This is why statistics are misleading.