I found a lost cemetery. What should I do?

Today while working in a hay field I looked and saw what I thought was a stone sticking up out of the ground so I went to pick it up and get it out of the hay field and discovered it was a headstone. I looked around and started finding several headstones and foot markers buried under the dirt. Most are from the early to mid 1800's. As long as I can remember nobody ever knew it was there. I sure didn't. I think it is sad that such a large cemetery has been lost in time and now that I know its there I sure don't want to drive tractors and machinery over the graves. Is there someone I can report it to? Like a society that looks for lost graveyards? I think all the tombstones should be dug up out of the ground and stood upright again and a fence built around it. I know these people have to have decendants who have no clue where there great grandparents and aunts and uncles are buried. They should be told somehow and I dont know how to find them.