Exploring a new city is great, crappy tourist maps are not. Not only do they stubbornly refuse to return to their original folded form but, consequently, fall to pieces in minutes. God help you if it rains.
Emanuele Pizzolorusso could well irradicate map-induced rage from major tourist destinations with his "Crumpled City" maps. No need to fold these waterproof beauties— just screw them up and shove them in their little bag. How liberating.