An interesting package in R for making very nice visualizations is rCharts.

Here is the link to the github http://ramnathv.github.io/rCharts/.

This package uses leafletjs http://leafletjs.com/.

The following R code produces a map of the CSU East Bay Hayward campus.

library(rCharts)
library(leaflet)

map3 <- Leaflet$new()
map3$setView(c(37.65602,-122.05415), zoom = 13)
map3$marker(c(37.65602,-122.05415), bindPopup = "<p> Hello from CSU East Bay </p>")

To see the plot you need to type

map3

at the command prompt.