The Seven Sisters cliffs are a series of chalk cliffs by the English Channel. They form part of the South Downs in East Sussex, between the towns of Seaford and Eastbourne in southern England. They are within the South Downs National Park which is bounded by the coast, the Cuckmere and the A259 road. They are the remnants of dry valleys in the chalk South Downs, which are gradually being eroded by the sea.
I took this photo of Seven Sisters cliffs during a storm, you can see that the sea as turning chalk white as the waves batter the cliffs. I have another photo of nearby Beachy Head here and it lighthouse.