September 24, 1906 saw that Great American, Teddy Roosevelt, declare what Wyoming landmark the first ever National Monument?
National Monument (United States) monuments can be so designated through the power of the Antiquities Act of 1906. President Theodore Roosevelt used the act to declare Devils Tower in Wyoming as the first U.S. national monument. The Antiquities Act of 1906 resulted from concerns about protecting mostly prehistoric Native American ruins and artifacts (collectively termed "antiquities") on federal lands in the American West. The Act authorized permits for legitimate archaeological investigations and penalties for taking or destroying antiquities without permission. Additionally, it authorized the president to proclaim "historic landmarks, historic and prehistoric structures, and other objects of historic or scientific interest" on federal lands
Rainbow Bridge National Monument one headed by University of Utah Dean Byron Cummings, and another by government surveyor, W.B. Douglass – began searching for the legendary span. Eventually, they combined efforts. Paiute guides Nasja Begay and Jim Mike led the way, along with trader and explorer John Wetherill. Late in the afternoon of August 15, coming down what is now Bridge Canyon, the party saw Rainbow Bridge for the first time. The next year, on May 30, 1910, U.S. President William Howard Taft used presidential proclamation to designate Rainbow Bridge National Monument. Teddy Roosevelt and Zane Grey were among the first visitors to make