Historical

Bonneyville Mill: One of northern Indiana's historic gristmills

Buhrstones: Grain grinders of pioneer mills

Burton Tunnel: One of Indiana's longest railroad tunnels

Greene County's railroad viaduct: Third largest in the world

Indiana mineral wool helps save energy

Indiana's glass sand industry

Lime kilns: Relics of one of Indiana's historic mineral industries

Natural cement: Pioneer Hoosier mineral industry

New Harmony: 19th Century center of culture and science

Old mill at Spring Mill State Park

Pioneer brickmaking in Indiana

Portland cement: Rediscovery of ancient Rome's hydraulic cement

Tunnel Mill: One of Indiana's historic water mills

Reuben Wells: Hoosier locomotive of distinction