Wyandotte cave, in Crawford county, Indiana, near the Ohio river, is now known to be next to the famous Mammoth cave, of Kentucky, in grandeur and extent. Its length is said by some to be twenty-three miles, but more careful estimates have placed it at considerable less—about nine or ten miles. The tortuous routes and difficult passages which must be fo. 1 wed in making an exploration make the distance seem greater than it really is. The general character and appearance of the cavern is similar to that of the lammoth, and like the latter, is greatly inferior to the well-known caves in Virginia in beauty. The older portions of the Wyandotte were known ever since the settlement of the surrounding country. In 1850 an extensive addition was •opened up, and recently another large chamber has been explored. Openings are seen which lead to still other chambers beyond those already known. The structure of this immense cavern differs somewhat from that of other caves. Instead of the funnel-shaped domes formed by surface drainage, found in the Mammoth, cave, are ■extensive halls or chambers with arched roofs,