A number of Ayrshire's architectural landmarks will be making an appearance on TV later on today.

In the programme, presenter and railway expert Tim Dunn visits Ballochmyle Viaduct and the Laigh Milton Viaduct for 'The Architecture The Railways Built' on the Yesterday channel.

The Ballochmyle Viaduct, the highest railway viaduct in the UK, was built in the 1840s for the Glasgow, Paisley, Kilmarnock and Ayr Railway Company.

It crosses the River Ayr near Mauchline and Catrine and currently carries passengers travelling on the Glasgow to Carlisle line.

Tim Dunn said: “Ayrshire not only has some fascinating and important historical railway architecture, but also some of the most beautiful, stunning views in the whole country.

"I’m really proud that we manage to capture both of those things in this episode and can show them off to a wider audience on Yesterday.” 

Upon arrival at the Ballochmyle Viaduct, Tim said: “It has to be one of the most beautiful viaducts anywhere in the UK” and “truly a work of masonry genius”.

Tim is joined by John Yellowlees, Railways Ambassador for ScotRail, and together they reveal to viewers all about the impressive structure, including why it was originally built, how it is still Britain’s tallest railway viaduct and, at 52 metres tall, is even taller than the Forth Bridge.

The viaduct was, for over 50 years, the largest masonry structure in the world.  

The programme later visits Laigh Milton Viaduct, between Kilmarnock and Troon which spans the River Irvine.

In amongst the stunning shots of the viaduct and surrounding countryside, viewers learn how it is thought to be the oldest surviving viaduct in the world ever to have carried passengers on a public railway, and how a £1m restoration project in 1996 has restored the disused viaduct to its former glory.  

The Architecture The Railways Built can be seen on Mondays at 8pm on the Yesterday channel with episodes also available to catch-up on demand on UKTV Play alongside all episodes from the previous two series.