The viaduct is the worlds oldest known surviving railway viaduct. The viaduct, when you first get a glimpse of it, has a medieval feel. With its beautiful light colored stone bricks and old world look and feel, it is ideal for many pictures and paintings. The viaduct was also part of the Kilmarnock Troon railway. This railway and viaduct are a serious must for any railway enthusiasts or one that adores historic landmarks.

The bridge or viaduct was designed by a budding engineer by the name of William Jessop. However, the actual erection of the viaduct was completed by a masonry expert named, John Simpson. It was constructed to help the Duke of Portland transport his horse-drawn carts of coal from the mines to Troon Harbour. When the viaduct was shut down, due to a more modernized version of a viaduct that was built upstream from it.

The Laigh Milton Viaduct has since then, fell to very unstable situations, but a group of Civil Engineers has purchased it and has had it restored. For them to be able to carry out such a restoration, the River Irvine had to be damned for while and they had to take part of it down and reconstruct it. Now, it has an internal infrastructure of solid steel, that does an ideal job of supporting its heavy masonry weight and its arch construction. Any stones in need of replacement, was upgraded as well. They also seen to it, that a metal railing was constructed atop of the viaduct, to allow for the public to cross it without safety concerns. The group heading the restoration, won an award for restoring a structure that was in a state of almost total disrepair.