Dot and Tot of Merryland by L. Frank Baum

Gliding out of the archway into the Second Valley of Merryland, our little voyagers saw before them a big enclosure shaped like a diamond. Along two sides of this diamond the river ran very slowly, and upon the bank at their left rose a huge, straight wall of solid rock, that seemed, as they looked up, to reach to the clouds.

Upon the bank at their right hand, however, was a broad, flat country, which seemed at first sight to resemble any other beautiful valley, having trees and meadow, roads and fences, and a few pretty houses clustered near the river bank.