Climbers found strange small train tracks on a cliff face leading into the mountain.

When they followed the rails inside, the discovery made authorities closed the area to the public immediately.

Experienced alinist Albert Hayes was climbing a remote peak in the Rockies when his handhold turned out to be a rusted iron rail.

He looked up, spotting a track system vanishing into a fissure.

Calling his partner Sarah, they ascended the dangerous section and squeezed through the opening, entering a freezing handcarved tunnel.

Following the rails deeper, they passed rotting beams and discarded tools, suggesting a sudden exit.

They eventually reached a cavernous winch room filled with massive rusty gears.

Sarah wiped grime from a crate near a coal cart.

The moment her headlamp illuminated the strange weeping crystals coating the wood, Albert grabbed her arm in terror and dialed emergency services instantly.

The crate contained sweating dynamite with unstable nitroglycerin crystals forming on the exterior, making it volatile enough to explode from the slightest vibration.

Authorities identified the site as a forgotten 19th century coal mine that used a narrow gauge cable incline to transport ore down the cliff.

The miners had fled abruptly due to a collapse, leaving the explosives behind.

Since removal was impossible, the bomb squad triggered a controlled blast to seal the entrance, ensuring the mountain’s deadly secret remained buried in the rock forever.