NATIONAL MONUMENTS SYSTEM 293 



reason it bears the name of these celebrated explor- 

 ers, though it is not even claimed that Lewis and 

 Clark, nor any of their men, knew of the cave's ex- 

 istence. Ranking with this, for contrast, are some 

 of the world's noblest spectacles, particularly the 

 Carlsbad Cavern in New Mexico unequalled in the 

 world in size and magnificence of decoration, the in- 

 comparable Rainbow Bridge, the imposing volcanic 

 spectacle at Katmai, and the incomparable funnel of 

 glaciers at Glacier Bay. The two latter are on the 

 Alaskan Coast. 



There is probably no other single object in the 

 world at once so appalling in size and environment 

 and so exquisitely beautiful as the gorgeous arch of 

 Rainbow Bridge. It would easily span Madison 

 Square in New York City, and the adjoining Flat- 

 iron Building would slip under it with room for 

 three floors to spare. Of red sandstone in a yellow 

 desert, its modelling and proportions suggest the in- 

 spired art of man. Our three largest natural 

 bridges, in Southern Utah, together also constitute a 

 National Monument. 



Devil Tower, core of a once great volcano in 

 Wyoming; the Devil Postpile, basaltic columns in 

 the Sierra ; Capulin Mountain, a perfect cinder cone 

 in New Mexico; Katmai, scene of a terrific volcanic 

 explosion in 1912; and Craters of the Moon in 

 Idaho; offer a remarkable exposition of volcanic 

 phenomena. The Petrified Forest of Arizona, the 

 mine of prehistoric monsters in Utah known as Di- 



