A Monarchia III. katonai felmérése
3rd Military Mapping Survey of Austria-Hungary
A WONDERFUL site! You click on the area and up comes old maps. One of the things that was once impressed upon me, and I impress upon others, is that settlements tended to be no more than a day's walk and back, meaning about 5 miles, from each other. As a result, until the era of modern transportation by engine, many people lived in the same town and married their neighbors, or someone from that one day's walk and back, because it was simply too difficult to meet and get to know someone who lived much further. Of course there were information networks and arranged marriages that defy this reasoning, but so far in my research I generally find more distant people to be married because they had money, and the resources for transportation!
These are very useful when you're researching your family history and the names of some villages and towns are not coming up or when you are trying to locate military records. Give it a try!