Ouse Valley Viaduct in Sussex , England.

A structural marvel, the viaduct was originally built in 1838 to carry the London-Brighton line over the river Ouse. Construction end in 1842 . The Viaduct is 96 feet(29 m) high and is carried on 37 semi-circular arches ,each of 30 feet (9,1 m), spanning a total length of 1,480 feet (450m).

It has been estimated that around 11million bricks were used in construction .