Monument to Monuments (of the United States), proposed 2021.
Expansive field of full-sized facsimiles of every monument in the US. 

Sited in the high plains of Kansas (geographic center of continental US with lots of flat ground).

Grouped by content (all the Lincolns together, all the Holocaust memorials together, all the Korean war memorials together, etc). Within content groups, arranged by form (all the busts of Lincoln, all the horse riding Lincolns, all the plaques commemorating Lincoln, etc).