Mammoth Cave, in Kentucky, is eighty-five miles by railroad southwest of Louisville. The cave is about ten miles long; but it is said to require upwards of one hundred and fifty miles of traveling to explore its multitudinous avenues, chambers, grottoes, rivers and cataracts. It is the largest cavern in the world. The main cave is only four miles long, but it is from forty to three hundred feet wide, and rises in height to one hundred and twenty-five feet. Lucy’s Dome is three hundred feet high, the loftiest of the many vertical shafts that pierce through all the levels.
It is estimated that there are more than four thousand sink-holes and five hundred open caverns. Some avenues are covered with a continuous incrustation of the most beautiful crystals; stalactites and stalagmites abound.
There are several lakes or rivers connected with Green River outside the cave, rising with the river, but subsiding more slowly, so that they are generally impassible for more than six months in the year. The largest is Echo River, three-fourths of a mile long, and in some places two hundred feet wide. The air of the cave is pure; the temperature keeps at about fifty-four degrees.
Among the most striking facts which exploration has revealed are the following: there is a pit, named the Bottomless Pit, one hundred and five feet deep, besides Scylla, one hundred and thirty-five feet deep. Crevice Pit, with Klett’s Dome, which forms a part of it, is one hundred and fifty feet in total vertical measurement. Cleveland Avenue is two miles long, Silliman’s one and one-half miles and in places two hundred feet in width. Large stretches of water have been christened Dead Sea, Lake Lethe; also there are the Styx, and Roaring and Echo rivers. In the outer galleries of the cave millions of bats are congregated. There are also blind fish, crayfish, crickets, and other abnormal insect inhabitants of the cave.
BIG TREE, CALIFORNIA
The Mariposa Grove of Big Trees (six thousand five hundred feet), so-called from its situation in Mariposa (“butterfly”) County, occupies a tract of land four square miles in area, reserved as a State Park, and consists of two distinct groves, one-half mile apart. The Lower Grove contains about two hundred and forty fine specimens of the Sequoia Gigantea, including the “Grizzly Giant,” the largest of all, with a circumference of ninety-four feet and a diameter of thirty-one feet. Its main limb, two hundred feet from the ground, is six and one-half feet in diameter. In ascending to the Upper Grove, which contains three hundred and sixty big trees, the road goes through a tunnel, ten feet high and nine and one-half feet wide (at the bottom), cut directly through the heart of a living Sequoia, twenty-seven feet in diameter. (See illustration.) About ten of the trees exceed two hundred and fifty feet in height and about twenty trees have a circumference of over sixty feet, three of these being over ninety feet. The Calaveras Grove has taller trees than any in the Mariposa Grove, but the latter has those of greatest circumference. At Santa Cruz there is a grove which contains about a score of the genuine Redwood with a diameter of ten feet and upwards. The largest is twenty-three feet across; one of the finest, named the Giant, has a circumference of seventy feet. Here is a large hollow tree in which General Fremont camped for several days in 1847. Another stump is covered with a platform, which holds twelve to fourteen people.
Niagara Falls.—See under [Famous Waterfalls].
Yosemite Valley is the name of a cleft in the west slope of the Sierra Nevada, about the center of California, and one hundred and forty miles east of San Francisco. The name Yosemite is an Indian word which signifies “large grizzly bear.” This celebrated valley, noted for the sublimity and beauty of its scenery, is about six miles long and from one-half to nearly two miles in breadth, and is traversed by the Merced River. The beholder is awed and impressed by the massiveness of its mountain elevations, the nearly perpendicular granite walls, from three thousand to six thousand feet high, by which it is shut in throughout its entire length, and the grandeur of its waterfalls, which are in some respects the most remarkable in the world.