Forge Points may be contributed to Great Buildings, based on historical structures and which can be assembled when a player finds the correct blueprints.[14] Great Buildings offer higher benefits but require goods to build and many forge points to advance.[14] It is possible to speed up construction and research with diamonds. However, diamonds can sometimes be acquired upon the completion of certain quests and through some buildings like the Crows Nest[15] and Wishing Wells.[16] Some players with large cities start new worlds on the same server, and fill them with those types of buildings (such cities are called "diamond farms"),[17] as diamonds are shared by the account's multiple cities on worlds of the same (language) server.[18]