My latest assignment for National Geographic magazine has taken me to La Geoda de Pulpi on the coast of southern Spain. I am here with filmmaker Martin Hemingway-Moseley (@martin_hemingwaymoseley) to document the research of the giant gypsum crystals inside the worlds largest geode. Over the next week or so, we will explore and document this amazing subterranean jewel. Stay tuned. #giantgeode#pulpigeode#gypsumcrystal#OnAssignment@natgeo@geodapulpi