This is the Place Monument is located exactly where Brigham Young made his famous statement
Undetermined
While it is not even certain whether Young made the statement (see related myth) it is also not known where he made any statement at all. When the site was dedicated on July 25, 1921 by Elder B.H. Roberts, a member of the Seventy, he cited a journal of President Woodruff that proved that there can be little doubt that the spot the monument marked was very near to the actual place.
Sources: "111 Days to Zion," by Hal Knight and Dr. Stanley B. Kimball; Deseret News archives; lds.org; "The History of Emigration Canyon," The National Park Service; Mel Bashore and Chad Orton of the LDS Church History Library.
