Google Maps has made it easier for users to create custom maps. I have recently started volunteering at the University of Kansas Center for Sustainability and noticed that the map on the website had not been updated in a while. I also noticed when I was on campus interviewing that the map is made with Adobe Flash, which makes it inaccessible to those of us with Apple products.
I really like using Google Maps because it allows users to write descriptions for highlighted features, makes obtaining directions a breeze for people viewing the map, and gives users a glimpse of the location with the Street View function. The one downside that I have noticed is that Street View for the KU campus has not been updated since 2007 at some campus locations.
View KU Campus Sustainability Tour in a larger map
If you have created an online sustainability tour map on your campus, please post the link in the comments.