Workers in Factory — Black

3000 × 2376

Bridge under Construction — Black, Industrial, Afternoon

2200 × 1721

Workers on Bridge Cables — Black

1920 × 1200

Medieval construction site

2433 × 1578

Steel Bridge Truss

4272 × 2848

Aerial View of City Streets — Black, Dramatic, Afternoon

2560 × 1440

Steam Locomotives in Yard — Black

1700 × 1793

Aircraft Assembly Line — Black, Industrial

2600 × 1994

Ship Propellers in Dry Dock — Black, Industrial

2412 × 1519

Men Operating Printing Press

3000 × 2439

Minnesota Point from Incline Railway

4000 × 3135

Car assembly in early 1900s factory

1920 × 1200