In Portugal, Taking a Dive Into Sardines

All vacation is in some way an observation of other people working while you do not. A stay at a hotel bears witness to maids and hosts; dinner sees chefs, busboys and waiters; an excursion requires a tour guide, a driver, a boat mechanic if you’re lucky. But there’s a peculiarity in going to a working factory to stand on a raised platform watching locals do hard, old-fashioned work, while you escape your own job.

Porto, Portugal’s…