water optical illusion reflection in cueva de los verdes, an amazing lava tube and tourist attraction on lanzarote island, spain

amazing attraction canary cave cavern caves crystal cueva cuevadelosverdes curved deserts europe european evaporation flute formations forms geologic geological geology green grotto ground haria history hole illuminated illusion inside interior island islands land landmark lanzarote lava mine natural nature reflection rock spain stone tourism underground verdes volcanic volcano water