Wales has a castle pretty much in every town, in various states of repair, due to an exciting history. I saw a sign advertising 'Castle Scaffolding Wales.' Yes, they'll get plenty of work! At Carew Castle, an Easter Egg hunt was in progress. I liked this one which had a colouring sheet of a patterned egg for each child. As they went around the castle they would find a small pot of crayons of a particular colour, and a sheet showing which part of the egg should be that colour. So not only were they foraging, they were creating art. Dogs were welcome with owners.
The tidal mill nearby used a lagoon which had been created by building a dam on an estuary. The tide filled the lagoon and gates were lowered to hold the water until it was needed to power the mill. This mill has been extensively restored in an award-winning effort. As Wales is very hilly and has a lot of rivers, water-powered mills were built in many locations. A mill was a source of income, often paid in grain, for the owner who might be an abbey or landowner. Having a mill nearby meant the farmer did not have to travel far to get grain ground, so there was little competition.