Forty miles as the crow flies east of Monterey, California, in a spur of the low Coast Range, is a region which erosion has carved into many fantastic shapes. Because of its crowded pointed rocks, it has been set apart under the title of the Pinnacles National Monument. For more than a century and a quarter it was known as Vancouver's Pinnacles because the great explorer visited it while his ships lay at anchor in Monterey Bay, and afterward described it in his "Voyages and Discoveries." It is unfortunate that the historical allusion was lost when it became a national reservation. Two deep gorges, bordered by fantastic walls six hundred to a thousand feet high, and a broad semi-circular, flower-grown amphitheatre, constitute the central feature. Deep and narrow tributary gorges furnish many of the curious and intricate forms which for many years have made the spot popular among sightseers. Rock masses have fallen upon the side walls of several of these lesser gorges, converting them into picturesque winding tunnels and changing deep alcoves into caves which require candles to see. It is a region of very unusual interest and charm. SHOSHONE CAVERN NATIONAL MONUMENT On the way to the Yellowstone National Park by way of the Wyoming entrance at Cody, and three miles east of the great Shoshone Dam, a limestone cave has been set apart under the title of the Shoshone Cavern National Monument. The way in is rough and precipitous and, after entering the cave, a descent by rope is necessary to reach the chambers of unusual beauty. One may then journey for more than a mile through galleries some of which are heavily incrusted with crystals. LEWIS AND CLARK CAVERN NATIONAL MONUMENT Approaching the crest of the Rockies on the Northern Pacific Railroad, the Lewis and Clark Cavern is passed fifty miles before reaching Butte. Its entrance is perched thirteen hundred feet above the broad valley of the Jefferson River, which the celebrated explorers followed on their westward journey; it overlooks fifty miles of their course. The cavern, which has the usual characteristics of a limestone cave, slopes sharply back from its main entrance, following the dip of the strata. Some of its vaults are decorated in great splendor. The depredations of vandals were so damaging that in 1916 its entrance was closed by an iron gate. This cavern is the only memorial of the Lewis and Clark expedition in the national parks system; there is no record that the explorers entered it or knew of its existence.