1886. This work contains an account of the most famous caves and cave temples in the world, in which the researches of modern antiquaries have discovered the remains of a prehistoric age. In order to give completeness to the view of the subject, brief sketches have been added of the Catacombs of Rome and of Paris. The present volume is peculiarly interesting from its subject, taking the reader to the border lands of natural history and archeology, as well as to those of paganism and Christianity.