National Geographic Explorer Andrés Ruzo takes a ... You had the next wannabe Cortez, the next wannabe Pizzaro. And they were going in hungry for more gold and glory. These wannabe conquistadores ...

The gaping mouth of Resolution Copper Mining’s No. 10 shaft is 28 feet across and opens into a sheer drop of nearly 7,000 feet, making it the deepest continuous mine shaft in the United States.

The Pulpí Geode, found within an abandoned silver mine in 1999 in Spain’s Almería ... “Overheard at National Geographic.” “To me, the giant crystals of Naica, or the geode of Pulpí ...

San Manuel Mine was once the world’s largest underground copper mining operation in size of ore body, production capacity and infrastructure. It is located in the Old Hat mining district on the ...