Well would we be able to put something in Haven, or not? Thats really what we are asking here.
Well crud. That's surely an oversight, or it wasn't recognized as a request to put something in.
If it is not labelled, remains static (non-selectable) and doesn't look like a 'gravestone' -- I see no reason why an object cannot be placed near the pool on the cliff.
*smiles* Only one person have ever been buried there, the first character that permed, and 5 years later noone have decided to be placed there, because they have ties otherwhere.