Wife and I visited this spot. I had a hard time finding it, as its a small road entering the cemetery from the main road. GPS not perfect. The cemetery has some very old Graves. Quirky is what Id call it. I never actually saw the monument. I thought the witness monument was it. But my wife did and got a photo. But in typical NJ NY fashion it is actually right under the Rt 84 bridge. It is definately worth a trip if in the area. Note photo is of the witness monument. Not tri state.

We have stopped here multiple times on our way thru NY. Lovely spot to get out and stretch your legs in 3 States at once! Neat for the kids and what a view!

If not for Cindy who is an extremely responsive and got back to me immediately I would be giving them a 2. Took too long to get the stone and then had to wait Three more months for them to install it. Paul died September 25th 2024 and the stone was just installed 2 days ago. My I final issue was that the engraving was too light. It should have been deeper. It's hard to see as evident in the below picture

Pretty cool but I had to stop by the flower store to get directions to the entrance

Very cool place to stop, I was passing through and saw it on my navigation.
So I decided to stop and check it out. You access by entering the cemetery and drive to the end under the highway.