Culzean Castle overlooking the Clyde coast near Ayr. It was designed for the Kennedy family by Robert Adam and was built towards the end of the 18th Century. It also served as the home of Lord Summerisle, played by Christopher Lee in the 1970s horror film The Wickerman.
The New Bridge in Ayr, which was built in 1878 to replace a previous “New Bridge” built across the River Ayr in 1788 after that was washed away by flooding. The first wooden bridge here was built to replace a ford in about 1250. More pics and info: https://www.undiscoveredscotland.co.uk/ayr/ayr/index.html