Husband and I are odd balls and generally like to do the opposite of typical designs that people follow; so, would rather have a picture window in the shower[where we usually are anyways] though many would prefer having a tub there. Ask yourself: do I prefer shower or baths? Whichever you prefer most, place it where the window would be situated. We had a bathroom like yours but I find myself taking more showers due to being busy all the time. Probably used my separate tub a handful of times(my young kids thought it was a pool). Guess who used that bathtub more? It wasn't me lol

Hope this helps!

Consider a cleaner concept:

Mark very nice! For once a design that doesn't have the closet inside a bathroom!(Honestly hate this. OP, I would go with Mark's design, especially if you want the lake behind the tub. :)

WELL DONE! I love when I see a great design. Knew an architect back in college and he could sketch a building in minutes. Lol

Thank you for advice 😊