The water is the clearest and most tranquil turquoise colour that you can imagine. Lake Tekapo is picturesque, and it is also one of the places in NZ that is most famous for clear and bright sightings of the incredible Aurora Australis.
The drive into Queenstown is still one of the most beautiful things that I have ever seen in my life. Picture the kind of snow-capped mountains that you see all over tourism websites, and the kind of vibrantly clear water that seems impossible, and you have Queenstown.