Strava which markets itself as a “social-networking app for athletes” publicly made available the global heat map, showing the location of all the rides, runs, swims, and downhills taken by its users, as collected by their smartphones and wearable devices like Fitbit.

Since Strava has been designed to track users’ routes and locations, IUCA analyst Nathan Ruser revealed that the app might have unintentionally mapped out the location of some of the military forces around the world, especially some secret ones from the United States.

With a total of one billion activities logged on the Strava’s activity map, it is a whole lot of useful data from all over the world.

Although Strava’s publicly available activity map was live as of November 2017, Ruser recently noticed that the map includes the fitness routes of army soldiers and agents in secret base locations, including U.S. military bases in Afghanistan and Syria, a suspected CIA base in Somalia and even Area 51.

Source: Heat Map Released by Fitness Tracker Reveals Location of Secret Military Bases