Seldom Seen Valley Tourist Coal Mine offers an exciting unforgettable trip deep underground! You'll visit millions-of-years-old coal seams that were dug by hand, loaded on cars and hauled from the mine by mules. Former miners coduct these personally-guided tours and share details of their experiences with you. Many of the tour guides are descendants of the immigrant miners who toiled in these Pennsylvania country coal banks and worked at hand loading coal on a production basis for as little as .25 cents a ton.