Grotto in South Africa - Grotto del Cani - Grotto of Antiparos - Grotto of Guacharo - Snow Grotto - Cave of Fingal - Cave near Mexico - The Nitre Caves of Missouri - Okey Hole - Borrowdale - Needle's Eye.

Sweet interchange

Of hill and valley, rivers, woods, and plains,

Now land, now sea, and shores with forests crown'd. Milton.