Construction of a large dam

1562 × 1250

Tunnel boring machine in operation

990 × 754

Tunnel boring machine in operation

1600 × 900

Large tunnel boring machine

2598 × 1739

Underground tunnel construction site

1920 × 1278

Tunnel construction site

1500 × 1500

Underground railway tunnel

1600 × 1200

Tunnel construction in progress

1920 × 1200

Subway tunnel construction site

1920 × 1200

Underground tunnel with tracks

2560 × 1440

Tunnel construction site

1600 × 1200

Underground tunnel with railway tracks

1024 × 768

Underground railway tunnel

1200 × 900

Water tower construction in Africa

1148 × 1530

Construction of a cable-stayed bridge

2000 × 2500

underground industrial facility

2095 × 1254

Bridge construction site

2981 × 2400

Construction of a large bridge

1427 × 1122

Chicago Blackhawks Ice Crew 2010-11

1600 × 1200

Concrete tunnel interior

2048 × 1280