There’s everything from old sea charts to tourist guides from the 1950s, and users are adding more maps all the time. You can learn all kinds of things by clicking around on this site.

The Medieval Murder Maps project “provides fascinating insights into the ways in which people carried out violence, but also into the ways in which people worried about it,” Skoda said.

Meet a U.K. artist who teases stunning images from the lines on old paper maps London — These days, planning a journey is as easy as hitting "go" on a smartphone app.