nts of wind blow alternately into and out of
its mouth. It has many long passages and fine chambers gorgeously
decorated. It is a popular resort.

The United States Biological Survey maintains a game-preserve.

JEWEL CAVE NATIONAL MONUMENT

Northwest of Wind Cave, thirteen miles west and south of Custer, South
Dakota boasts another limestone cavern of peculiar beauty, through whose
entrance also the wind plays pranks. It is called Jewel Cave because
many of its crystals are tinted in various colors, often very
brilliantly. Under torchlight the effect is remarkable.

Connecting chambers have been explored for more than three miles, and
there is much of it yet unknown.

OREGON CAVES NATIONAL MONUMENT

In the far southwestern corner of Oregon, about thirty miles south of
Grant's Pass, upon slopes of coast mountains and at an altitude of four
thousand feet, is a group of large limestone caves which have been set
apart by presidential proclamation under the title of the Oregon Caves
National Monument. Locally they are better known as the Marble Halls of
Oregon.

There are two entrances at different levels, the passages and chambers
following the dip of the strata. A considerable stream, the outlet of
the waters which dissolved these caves in the solid limestone, passes
through. The wall decorations, and, in some of the chambers, the
stalagmites and stalactites, are exceedingly fine. The vaults and
passages are unusually large. There is one chamber twenty-five feet
across whose ceiling is believed to be two hundred feet high.

MOUNT OLYMPUS NATIONAL MONUMENT

For sixty miles or more east and west across the Olympian Peninsula,
which is the forested northwestern corner of Washington and the United
States between Puget Sound and the Pacific Ocean, stretch the Olympian
Mountains. The country is a rugged wilderness of tumbled ranges, grown
with magnificent forests above which rise snowy and glaciered summits.
Its climax is Mount Olympus, eight thousand one hundred feet in
altitude, rising about twenty-five miles equidistant from the Strait of
Juan de Fuca upon the north and the Pacific Ocean upon the west.

The entire peninsula is extremely wild. It is skirted by a road along
its eastern and part of its northern edges, connecting the water-front
towns. Access to the mountain is by arduous trail. The reservation
contains nine hundred and fifty square miles. Although possessing
unusual scenic beauty, it was reserv