Good Ideas for what to do in Summer?

So Summer is nearly here, and I have no idea how I’m about to start it.
I want a good start, obviously, but I have no idea what to do.
So I need suggestions and ideas on how to spend Summer, and how to ‘celebrate’ the first day of Summer.
What would you do on the first day of Summer?
How would you spend your Summer?
Any ‘unique’ or ‘over exaggerated’ ideas are also accepted. You can say crazy things, as long as they’re achievable. I want this summer to be DIFFERENT.
(Don’t suggest travelling. I’ve already thought that one out. However, you can suggest PLACES to go. Specifically.)
Oh, and I forgot. I want it to be FUN. So yeah, fun suggestions.