Park Lake

Today I took Nienke and Inge to Park Lake, a very small lake near where we are staying. It's the same lake we went to yesterday but today the small beach looked a lot cleaner. Suddenly this large beautiful butterfly sat down on the beach and just kept sitting there, no matter how close I got to it. Don't have a clue what type it is but I've been told it's not very common around here. Weird, because I spotted two more today...

We're about ready to have lunch so I'll be off again. I'm hoping one of you can tell me what butterfly this is...