This is rock at the waters of Playa de Benijo Beach at Tenerife, three years ago at maybe the worst time of the day to photograph - early afternoon with harsh sunlight. I've covered my camera in a towel to protect it from the spray of the incoming surf while exposing the shot 6+ minutes with stacked ND filters. I've experimented with different ND grades and exposure times but with every shot I've tried to expose even longer so that the crashing waves and moving water at the shore turned into mist. Converting to black and white did the rest to make this a mysterious, special beach pic.