Discover the Costliest Bridge Projects Around the Globe

13. Aqueduct Pont du Gard

Place of origin: Gard, France Founded in 100 A.D. Price: $7.5 million* The Pont du Gard was actually built in the first century A.D., so that period is accurate. Built between 40 and 60 A.D. over the course of twenty years, the project cost 30 million sesterces, or roughly $7.5 million in today's currency (though that estimate is quite rough). Water was intended to be carried across the Gardon River by the Pont du Gard.

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Aqueduct Pont du Gard ©Shutterstock/Kavram It supplied water to the ancient Roman colony of Nemausus (Nimes). Among all the Roman aqueduct bridges from antiquity, it is the highest and best maintained. Constructed from shelly limestone, UNESCO placed it on its World Heritage Sites list in 1985, recognizing its great historical significance.

14. The Khaju Bridge

Situated in Iran's Isfahan Founded in 1650 (repaired in 1873) The Khaju Bridge was constructed in the seventeenth century in Isfahan, Iran, at an unknown cost by King Abbas II. After construction was completed in 1650, the bridge stood with its twenty-three arches intact until the Iranian authorities rebuilt it and brought it back to its former splendor in 1873.

Khaju Bridge Fischer, Jakob, and Shutterstock Inside the building, King Abbas II erected a pavilion to enjoy the view of his dominion. In fact, some of the stone throne's fragments are visible today. Bricks and stones are used to build the bridge. It was originally embellished with paintings and tilework by King Abbas II, and the bridge featured a teahouse. Over the Zayanderud, it passes.