1 Britannia Bridge, Menai Straits
2 Meldon Viaduct, Okehampton
6 Central Line, Australia
7 The Longest Straight Run, Australia
8 Snowsheds in the Rockies
10 Attock Bridge, North-West Frontier, India
11 Nilgiri Hills Rack Railway, South India
13 Rimutaka Pass, New Zealand
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15 San Paolo Railway, Brazil
20 Viaur Viaduct, France
21 Barmen-Elberfeld Railway, Germany
24 Faux-Nam-Ti Bridge, Indo-China
27 Infernillos Bridge, Central Railway of Peru
30 Somport Tunnel, Pyrenees, Spain
31 Bernina Railway Spiral, Switzerland
35 Langwies Viaduct, Switzerland
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39 Rhine Falls Bridge, Switzerland
44 Diablo Canyon, Arizona, U.S.A.
45 Key West Viaduct, Florida, U.S.A.
48 Pikes Peak Railway
49 Royal Gorge
50 Salt Lake Viaduct, Utah, U.S.A.
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