Realize this thread is a few months old but surprised NCL Bliss and Encore haven’t been mentioned, both have amazing observation lounges that are 2 stories high directly over the bridge. The lounges themselves take up about a third of deck 15 and the side windows are floor to ceiling and about 10 feet wide. The main caveat is on glacier days they are packed. Our day in glacier bay at 5:30am people had already claimed bulk of the seating. Outside of that portion of the trip we could almost always find seating and spent a lot of time there just watching the world go by. We likened the Atrium as the family room and the observation lounge as the living room.
Note the NCL Joy has a similar observation lounge - the forward portion is basically identical but the side windows are not as wide/unobstructed as it’s sisters. Also on all three ships there is yet another 2 story observation lounge on top of the main lounge for Heaven guests.
Overall we are finding it difficult to plan future cruises to similar locations without such lounges.
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