EVERY morning, two dozen miners and engineers pack into a cage-like elevator for an 11-minute descent into the bowels of South Dakota’s Black Hills.
At the bottom, 1.5km beneath the surface, they step out into a rocky, twisting corridor. This leads to two vast caverns, each as high as a seven-storey building.
Already a subscriber? Log in.
Limited time offer:
Just RM5 per month.
Cancel anytime. No ads. Auto-renewal. Unlimited access to the web and app. Personalised features. Members rewards.
Follow us on our official WhatsApp channel for breaking news alerts and key updates!