The Lansdowne Bridge - The Lansdowne Bridge Rohri was a railway bridge between Sukkur and Rohri, Pakistan, in the province of sindh. It is marvel of nineteenth century engineering, the 'longest "rigid" girder bridge in the world' at that time, was begun in 1887. The bridge permitted trains from Karachi towards the north to cross the Indus without using a ferry service. It is the longest cantilever bridge ever built, it had to support the load of heavy steam locomotives.