Unique Beach Honeymoon Help!

I don't even know where to start –

We want a ~ unique ~ honeymoon spot (we're in the US, where it seems everyone does St. Lucia, Hawaii, etc.) we both travel a lot and have done Carribean/Hawaii together 🙂

We're thinking September but I am unsure about wet/dry season especially in the Pacific. Does anyone have stories of early fall trips they want to share and if they recommend it? Literally anywhere! I know I said unique but Bora Bora, Tahiti, seem appealing to me, somewhere we can both relax and enjoy awesome snorkeling/adventures, while my partner thinks unique is more important (he'd love Japan/Africa vibes)….