Iwo Jima Photo Album, Image 18

Tunnels carved by the Japanese on Iwo Jima. Caption; "Elaborate caves and tunnels were carved out of the volcanic rock throughout the island."

Iwo Jima Photo Album, Image 20

Artillery shells and ladder in a cave. Caption; "Caves were numerous."

Iwo Jima Photo Album, Image 33

The exterior of a fortified cave. Caption; "Many caves like this - made the going very slow."

Iwo Jima Photo Album, Image 39

Marines exploring fortified caves. Caption; "Careful and Cautious investigation was made of all Japanese caves."

An excursion to the Mammoth Cave, and the barrens of Kentucky : with some notices of the early settlement of the state /

Title on spine: Mammoth Cave of Kentucky.