Today starts a five-week cruise on Crystal Serenity with the first segment around the British Isles. Departure was from Dover.
These are the famous White Cliffs of Dover. They are called this because they are white, and they are white because they are formed from chalk (pure white calcium carbonate).
Being the narrowest part of the English Channel, this spot is also famous for English Channel swims.
More importantly, it is the closest point to Continental Europe from the UK. The 100-meter cliffs allowed Britain to withstand sieges throughout history, including WWs I and II. It also didn’t hurt that the British Navy controlled the seas.