This U-shaped line of dignified brick houses, built in 1714 for ironworkers, is closed for renovations until 2020, but you can still visit its restored almshouse for the poor, which is certainly worth an hour to see how charity cases lived back in the day. They were so mean to poor people! Good thing we’re not at all mean to them these days. (Check the website for the schedule; £5 adults, free for children 15 and under.)