A little-known mountain in central Iran is once again being put on the radar of international attention after U.S. President Donald Trump warned it could become a future military target as the United States and Iran escalate tensions.
The site, also known as "Pickaxe Mountain" in the media and by analysts, is close to Iran's Natanz nuclear complex in Isfahan province. Although its purpose is not clear, intelligence and commercial satellite images suggest the mountain contains a large underground tunnel complex believed to be associated with Iran's nuclear infrastructure.
Trump's Warning
President Trump said in an interview that the US is closely monitoring the facility and could strike it if Iran’s tensions continue to escalate.
His remarks have revived global attention on the heavily fortified site, which has long been considered by security analysts to be one of Iran's most secure underground construction projects.
But no official evidence has been released to confirm the specific activities taking place inside the facility, and Iran has not acknowledged the site as an active nuclear installation.
What is Pickaxe Mountain?
"Pickaxe Mountain" is an informal name used by analysts for an underground tunnel complex built into Kūh-e Kolang Gaz Lā, a mountain south of the Natanz nuclear facility.
Construction was reportedly accelerated after an explosion damaged parts of the Natanz enrichment facility in 2020.
Since then, satellite images have shown:
Extensive tunnel excavation
Multiple tunnel entrances
Reinforced access points
New access roads
Heavy construction activity
These developments have fueled speculation that Iran is expanding underground facilities designed to better protect sensitive infrastructure.
What is the meaning of Site Strategically Important?
One of the most significant features of Pickaxe Mountain is its depth.
According to defence analysts, parts of the underground complex could be buried 80 to 100 metres under rock, far deeper than many previously known Iranian nuclear facilities.
The depth of the site makes conventional air strikes and missile attacks less likely to succeed there.
Military experts say underground facilities provide more protection against:
Precision-guided missiles
Air strikes
Sabotage operations
Bombing campaigns
That is consistent with Iran's decades-long effort to fortify critical infrastructure after earlier attacks on its nuclear facilities.
Can it be destroyed?
Security experts are also concerned that destroying deeply buried underground facilities is an exceptionally difficult military task.
Even the most powerful conventional bunker-busting weapon, the GBU-57 Massive Ordnance Penetrator (MOP), is designed for hardened underground targets, but experts say that the publicly available information is insufficient to determine whether a single strike could destroy a facility of that depth.
The effectiveness of any military operation would depend on several factors, including depth, geological composition, engineering design, and defensive measures surrounding the site.
What Does Iran Say?
Iran has always maintained that its nuclear program is for peaceful civilian purposes such as energy production and scientific research.
But Western governments have long worried that parts of Iran's nuclear programme could potentially contribute to the development of nuclear weapons, something Tehran has repeatedly denied.
The exact role of the underground complex at Pickaxe Mountain has not been independently verified, and much of the publicly available information is based on satellite imagery, intelligence assessments, and expert analysis rather than official confirmation.
Rising Regional Tensions
Trump’s comments come at a time of increasing geopolitical tensions between Washington and Tehran.
Any military action involving strategic nuclear-related infrastructure could very well exacerbate instability in the Middle East and cause wider international consequences.
Diplomatic observers continue to urge restraint, emphasizing that negotiations and international monitoring are the preferred avenues for addressing Iran’s nuclear activities.
Global Attention Remains on the Site
Pickaxe Mountain has been one of the most closely watched locations in Iran as diplomatic and military tensions continue to evolve.
Whether it is ultimately confirmed as part of Iran’s nuclear infrastructure or is simply a matter of strategic guessing, it is now at the centre of international security discussions, reflective of the wider issues surrounding nuclear proliferation, regional stability, and global diplomacy.
