You may send tribers there to build Monuments. Filling all spaces around a Monument token will result in finishing the construction and can bring extra Happiness Points in the Clean-up phase (see: Clean-up phase), depending on the number of tribers sent, as marked on the chart on the left side of the board.

If at any time during the game all triber spaces around a Monument token are occupied by tribers, immediately raise the Harvest level of the resource marked on the token