Discover the Costliest Bridge Projects Around the Globe

11. The Sundial Bridge

Located in California's Redding Founded in 2004 Price: $23.5 million Situated in Turtle Bay, Redding, California, the Sundial Bridge is a pedestrian and cyclist-friendly cantilever spar bridge supported by cables. It resembles a massive sundial in shape. For $23.5 million in 2004, Santiago Calatrava designed the Sundial Bridge. With a clearance of only 26 feet, it spans 700 feet.

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Bridge of Sundial Copyright: Andrew Zarivny/SShutterstock The Sacramento River is crossed by the Sundial Bridge. The McConnell Arboretum & Gardens and the southern and northern portions of Turtle Bay Exploration Park, which house museums, are both accessible from the Bridge. Another entrance to the 35-mile Sacramento River Trail is the Sundial Bridge.

12. The Seven Mile Bridge

Situated in: Florida Established (Road Bridge): 1982 * Price: $121.42 million A crucial component of the Florida Keys is the Seven Mile Bridge, which is situated in Monroe County, Florida. It links Knight's Key in Marathon, Florida (the Middle Keys), with Little Duck Key in the Lower Keys. Part of the 2,368-mile Route 1, it is one of the world's longest bridges.

Seven-Mile Overpass ©Shutterstock / pisaphotography There are actually two versions of the Seven Mile Bridge: one that is accessible to vehicles and another that is restricted to walkers and cyclists. While the US Route 1 connecting bridge was built in 1978 and opened to traffic in 1982, the older bridge dates back to 1909.