There are two ways to destroy your personal monument or claim.
- If Support points reach zero. The personal claim will be removed automatically at next midnight. All objects will still be there but anyone will be able to interact with them. They will take decay damage every in-game midnight and can be looted by other players.
- Remove ability. You can destroy your own claim using this ability. You can claim lands only if you have no existing personal claim.
- Those are only two ways that can cause a personal claim to disappear.
- If you facing issues managing personal claim - "Resize" and "Remove" abilities "grayed out" - please take a look at this article: Issues with personal claims