1
VIADUCT, CLEVELAND
| 
2
NATURAL BRIDGE, IRELAND
| 
3
INTERNATIONAL BRIDGE, BUFFALO
| 
4
CANTILEVER, NIAGARA RIVER
| 
5
OHIO RIVER BRIDGE
| 
6
GIRARD AVE., PHILLY
| 
7
LONG BRIDGE
| 
8
STONY CREEK
| 
9
DELAWARE @ HUDSON
| 
10
LONG DRAWBRIDGE, HUDSON
| 
11
SMITHFIELD ST. BRIDGE, PITT.
| 
12
POUGHKEEPSIE BRIDGE
| 
13
HIGH BRIDGE, NY
| 
14
UNION PACIFIC, OMAHA
| 
15
BROOKLYN BRIDGE
| 
16
SIXTH AVE BRIDGE, PITT
| 
17
HARTFORD CONN
| 
18
PORTAGE VIADUCT, WY
| 
19
ST. JOHNS, NEW BRUNSWICK
| 
20
WASHINGTON BRIDGE
| 
21
MISSISSIPPI BRIDGE
| 
22
CALLOWHILL, PHILLY
| 
23
SUSPENSION BRIDGE, NIAGARA
| 
24
NATURAL BRIDGE, VA
| 
25
FIRST AMERICAN BRIDGE
| 
26
N102 BACK
| |
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