Overview: Armed with his Bradshaw's guide, Michael Portillo continues his journey through southern Scotland. He celebrates Victorian iron and steel in Motherwell and admires one of its crowning achievements - the Forth Rail Bridge. Michael journeys through picturesque countryside to admire the raw power of nature at the magnificent and romantic Clyde Falls, which inspired Wordsworth and Coleridge, and where Victorian ladies swooned. In Cumbernauld, Michael learns of the birth of one of Scotland's best-selling soft drinks. In Linlithgow, he marvels at the ingenuity of the engineers who built the Union Canal and experiences a 21st century technological refinement at Falkirk.