At Bismarck, capital of the State, which is a small but energetic and thriving place, the Missouri River is crossed by a magnificent iron bridge, hung high in air, which cost a million dollars. This is the acme of successful engineering, passing our long, heavy train of cars over a track of gleaming rails from shore to shore without the least perceptible tremor, or the deflection of a single inch. The great waterway which it spans measures at this place fully twenty-eight hundred feet from bank to bank, though it is at this point two thousand miles from its confluence with the Mississippi. The route we are following soon takes us through what are called the Badlands, a most singular region, where subterranean and surface fires are constantly burning, where trees have become petrified, and where the natural blue clay has been converted into terra cotta. This locality, extending for miles and miles, has been called Pyramid Park, on account of its fantastic forms presented in a singular variety of colors, and because of its mounds, domes, pyramids, and rocky towers. These vary as much in height as in form, some measuring ten feet, some two hundred, while all are clad in harlequin costume, black, white, blue, green, and yellow. It is called Badlands in contradistinction to the adjoining country, which is so very fertile, but the district is improved as good grazing ground for many thousands of cattle which supply our Atlantic cities with beef. Some of the best breeds of horses furnished to the Eastern States are raised, fed, and brought into marketable condition on these peculiar lands. This region forms a sort of tangible hint of what we shall experience still farther on our Wonderland journey in the interesting and unequaled valley of the Yellowstone, where there are abundant evidences of volcanic force and subterranean fires, and where Nature is seen in her most erratic mood. Just as we pass from Dakota into Montana, a short distance beyond the Little Missouri River, a lofty peak called Sentinel Butte is seen, at an elevation of nearly three thousand feet above sea level. The teeming, vigorous young life of the Northwest is manifest all along the route, with its wonderful energy and its almost incredible rate of progress. We were told that in the State which we had just left three thousand miles of railroad had been built and properly equipped before it contained a single town of more than five hundred inhabitants.