A military bunker located near Karaj, Iran. The region around Karaj has been of strategic importance due to its proximity to Tehran and its location in the Alborz mountain foothills. Military installations in this area have historically served defensive and command purposes, particularly during periods of heightened regional tensions.
The bunker's exact function and construction date remain unconfirmed, but it likely dates to the late 20th or early 21st century given Iran's ongoing military infrastructure development.