The world's largest peace pipe began with a vision shared by three spiritual people: one Lakota and two Anishinaabe. The pipe stands on the grounds of the historic Rock Island Railroad depot near the entrance to the Pipestone National Monument, home to the Keepers of the Sacred Tradition of Pipemakers. The location of the giant peace pipe is significant; the pipestone quarry nearby is known as "the crossroads of the Indian world." The soft red stone from the quarry has been used by American Indians for thousands of years to create ceremonial peace pipes.