One of the most beautiful fishing spots I've ever seen is Lake Inle in Myanmar. There are all kinds of environmental problems occurring at this site, the most important being that the lake is filling in with dirt eroding from the surrounding hills. This problem and others are slowly being addressed.
Meanwhile one-legged rowers still ply their way silently back and forth across the lake tending to nets and aquaculture and carting tourists around. Fortunately, we've always been there off-season and have not seen the serenity ruined by crowds and noise. I have yet to hear a cell phone ringing unless the ring tones mimic the sound of a boat gliding over the water. The photos are from last September. I would return there in a moments notice.
I'm posting from Oman on the last leg (pardon the pun) of a vacation so I'm keeping this short.