UNAM’s Instituto de Geografía has made the Atlas nacional de México — the national atlas of Mexico — available online. The atlas is comprised of literally hundreds of high-quality maps on every subject a national atlas ought to have, from oceanography to national history. The drawback is that they’re only available as high-resolution scans — a couple of megabytes apiece — which make them a little hard to browse through. Still, a real find. In Spanish only. Via Catholicgauze.