Unless I am mistaken, I believe that is the player cemetery, to remember UOR players who have died IRL. I stumbled across it when I first came to UOR a few months ago, and asked @Chris about it. He told me what it was. I think it's awesome that UOR does this for its player community.
This has been my keep somewhere else for years. It's my favorite spot and it will be refreshed forever lol. The winner of this gets a real winner of a house.