Satellite images reveal Iran's underground fortification
Iran is reinforcing a clandestine underground complex near its nuclear facilities, satellite images have confirmed. This development surfaces as US-Iran tensions escalate, with former President Trump threatening military action for a revised nuclear deal.
Get the latest headlines in your email 
Images analyzed by the Institute for Science and International Security (ISIS) unveil fortified tunnel entrances at Mount Kolang Gaz La, aka Pickaxe Mountain. While its exact use remains uncertain, experts speculate it could shelter Iran's uranium enrichment activities or vital equipment.
Iran maintains its nuclear ambitions are peaceful, dismissing claims of weapon development. However, Trump alleged in June 2025 that Iran was nearing nuclear capability, prompting strikes on underground sites during a brief conflict with Israel. Though Pickaxe Mountain wasn't targeted, nearby Natanz endured air raids.
Photos from February 10 show fresh concrete and boom pumps reinforcing Pickaxe Mountain's access points. Both ISIS analysts and UK-based firm Maiar concur on these fortification efforts. Rock and soil adjustments and new concrete structures suggest preparations for potential air strikes.
Construction machinery hints that the facility's operational readiness is pending. ISIS speculates these fortifications are designed to protect against more than just centrifuge plants, possibly covering sensitive activities like uranium enrichment.
Simultaneous fortifications observed at Natanz and Isfahan nuclear sites reinforce this notion. At Isfahan, sealed tunnel entrances aim to deflect air strikes and protect any enriched uranium stored. A new roof atop a previously attacked structure further secures the site.
Meanwhile, Natanz exhibits above-ground repairs, including a new roof over a damaged anti-drone cage, post last June's strikes by Israel and the US. As Iran strengthens its defenses, international eyes remain fixed on its next steps in this perilous nuclear saga.
Key Takeaways
Iran fortifies underground site amid nuclear tensions.
Satellite analysis shows reinforced tunnel entrances.
Nearby nuclear facilities also bolster defenses.
Join the discussion? 
Already a member? 
Adapted by ASEAN Now · Source · 12 Feb 2026