Fantastic, you may say. It is fantastic. So far as I know there exists not one fact upon which definite predictions such as these may be based. But also there exists not one fact which warrants specific denial of predictions such as these. And if any inference whatever may be made from earth's history it is the inevitable inference that the period in which man lives is merely one step in an evolution of matter, mind and spirit which looks forward to changes as mighty or mightier than those I have suggested.
With so inspiring an outline, the study to which I invite you can be nothing but pleasurable. Space does not permit the development of the theme in the pages which follow, but the book will have failed if it does not, incidental to its main purposes, entangle the reader in the charm of America's adventurous past.
I
THE NATIONAL PARKS OF THE UNITED STATES
The National Parks of the United States are areas of supreme scenic splendor or other unique quality which Congress has set apart for the pleasure and benefit of the people. At this writing they number eighteen, sixteen of which lie within the boundaries of the United States and are reached by rail and road. Those of greater importance have excellent roads, good trails, and hotels or hotel camps, or both, for the accommodation of visitors; also public camp grounds where visitors may pitch their own tents. Outside the United States there are two national parks, one enclosing three celebrated volcanic craters, the other conserving the loftiest mountain on the continent.
I
The starting point for any consideration of our national parks necessarily is the recently realized fact of their supremacy in world scenery. It was the sensational force of this realization which intensely attracted public attention at the outset of the new movement; many thousands hastened to see these wonders, and their reports spread the tidings throughout the land and gave the movement its increasing impetus.