Stone Town architecture is Omani and Indian and coastal all at once, and the good bits are almost always the same move: a dark room pointed at a bright opening. Thick coral-stone walls keep the heat out, so the buildings hoard shade and dole the light out through carved doorways and shuttered windows.
The first is exactly that, a black interior framing a rectangle of turquoise sea and a carved balcony, a plant gone to silhouette in the gap. The second is an arched hallway, one pointed arch after another marching toward a lit doorway at the end. Both are rooms designed to deliver you to the light rather than hold any of their own.
Both the 55, base ISO to 400. The exposures fight you here, the shade and the glare too far apart to hold together, which is the whole character of the place in one technical problem.