We were on a family road trip out west when the kids were little and we passed a train north of Toadstool park in northwest Nebraska (15-20 miles from Chadron).
Pulling into the park we crossed the tracks that the big long coal trains use and could see the train coming toward us. Since we had a few minutes before the train got there I explained about track pennies and of course my kids had to try it (they collect those souvenir squashed pennies that you buy from the machines and have albums full of them). We set our pennies on the tracks, marking the location with a pop can and waved at the engineers as the train went by. The engineer tooted the whistle extra long for the kids. and when the train was gone, we scurried over to the track and started to search for our treasures. The track bed there is primarily large gray granite rock and we had to move quite a few baseball sized rocks to locate our pennies. The kids found theirs quickly and after finding the two I had set there, I dug a bit deeper and the base changed to a lighter smaller aggregate. To my surprise, I came up with two smaller squashed pennies. Trains nowadays are heavy and really thin out the coins, but these were less than double in size and on one you could see the wheatback, and on the other, an indianhead! Careful examination revealed the wheatback was from the 30's (forget the actual date) and couldn't get a date off the indianhead, but I can just imagine some kid way back when steam trains ran on these lines that didn't weigh what todays locos weigh.
And I am not sure how long these tracks have been there so it could have been some kid on a trip out west in the fifties too....guess I'll never know....BUT....
these coins have prominent places in my kids squashed coin folders, right up front and center!
It is where you find it!