Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

Fragments of a partial skull unearthed in a cave in northern Spain have revealed a previously unknown population of ancient ...

This is the Panel of Hands, El Castillo Cave, Spain. A hand stencil has been dated to earlier than 37,300 years ago and a red disk to earlier than 40,600 years ago, making them the oldest cave ...

Photo from A. Ruiz-Redondo, V. Barciela and X. Martorell Deep inside a partially flooded cave of eastern Spain, scientists studied the walls by flashlight. Some markings and a coin jammed between ...