I bought a pair of Camper shoes in the sales. Even better than the two thirds price reduction, each shoe has a different map of Barcelona on the sole. Excellent!
Now I won't get lost going up and down the Ramblas and I can direct strangers to, say, the Parc Guell or the Museum of Sexual Waxworks by doing an Irish Jig à la Michael Flatley and letting them do their own map reading.
Of course it makes my Nokia smart phone with its built-in GPS redundant. Oh well.