N'afọ 1918, Onye isi ala Woodrow Wilson kwupụtara Katmai National Monument na Alaska, nke gụnyere ihe karịrị 1,000,000 acres (4,000 km2). Katmai mechara gbasaa ihe fọrọ nke nta ka ọ bụrụ 2,800,000 acres (11,000 km2) site na mkpọsa nke Antiquities Act ma ruo ọtụtụ afọ bụ nnukwu ogige ntụrụndụ mba. Osisi Petrified, Grand Canyon, na Great Sand Dunes bụkwa ndị mbụ ekwuputara dị ka ihe ncheta mba ma emesịa họpụta ya dị ka ogige ntụrụndụ mba site na Congress. Na nzaghachi maka nkwupụta Roosevelt nke ihe ncheta Grand Canyon, onye na-azọrọ na ọ bụ onye na-egwu ala gbara akwụkwọ n'ụlọ ikpe gọọmentị etiti, na-ekwu na Roosevelt agafeela ikike Iwu Ochie site na ichebe ọgba dum. Na 1920, Ụlọikpe Kasị Elu nke United States kpebiri n'otu olu na Grand Canyon bụ n'ezie "ihe sayensị ma ọ bụ akụkọ ihe mere eme" ma nwee ike ichebe ya site na nkwupụta, na-esetịpụ ụkpụrụ maka iji iwu nke Iwu Ochie eme ihe.
Woodrow Wilson