King Fahd Causeway Photo: shmooj/Getty Images/iStockphoto

Opened in 1986, the King Fahd Causeway Bridge links Saudi Arabia and Bahrain. It is 25km (16 miles) long and, due to the ban on women driving in Saudi Arabia that existed for many years, it was the only bridge in the world where women could drive on to it from Bahrain, but would be breaking the law if they exited into Saudi Arabia at the other end.