The indus valley civilization was a widely spread ancient civilization. It flourished about 4500 years ago. It was spread across - what is today Afghanistan, Pakistan and India. Below four sites of the Indus valley Civilization across three countries can be seen.
library(leaflet)
m <- leaflet() %>%
addTiles() %>% # Add default OpenStreetMap map tiles
addMarkers(lat=30.6312, lng= 72.8683, popup="Harappa") %>%
addMarkers(lat=27.3243, lng= 68.1357, popup="Mohenjadaro") %>%
addMarkers(lat=29.2881, lng= 76.1131, popup="Rakhigarhi") %>%
addMarkers(lat=31.6289, lng= 65.7372, popup="Mundigak")
m