That is one strength of Uncharted 4. Every time I got the chance to look at the environments, they always looked beautiful. Especially the later levels on the islands. God were they beautiful to simply take in. I never really disliked any of the environments.
Honestly, most environments are fine by me. I can't really say that I can think of any that are simply boring that I dislike out of hand. I think my biggest issues are environments where the environment is a bigger obstacle than the enemies. So, underwater levels are certainly an example of this, with the NES Ninja Turtle game being the best example I can think of. Levels where there are way too many bottomless pits for a place to logistically have. I actually remember an AVGN episode on Ninja Gaiden where he states that he forgot he even had a health bar half the time because he almost never died from taking damage.
Even then, done right, I don't mind some levels. I remember the Deepest Dungeon in FFT. The whole thing is dark and you're unable to see the actual map. In order to progress you have to go space to space, with the Move-Find Item ability, to find the door to the next floor. However, crystals from defeated enemies light up the field (with enough you can actually see the details of the floor). Doesn't hurt that each floor has rare and powerful weapons and armor, making playing the levels worthwhile. So this is probably not the best example of a level being a bigger obstacle than the enemy. Though, even the poison marshes weren't too bad.