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

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