I used to work for a large technology company which had a silicon valley-like work culture. For the purpose of this story, that meant that people didn't have to wear suits at the office. Rather, they could wear as casual as they liked. In summer this usually meant that girls wore very revealing clothes.
There was a girl from my team, a few years older than most of us, but still very hot. She liked to wear very deep cleavages and she had the boobs to really show it. So most of the time when she asked me to go to her cubicle, she was sitting and I was standing next to her, thus having a very good view of her boobs. Unfortunately, she always wore bras that covered her boobs pretty well (her bras were nice though). Still a very nice view.
There was another girl from another team that was better known for her very short skirt and dresses (that in itself would warrant more stories, but that will be for another thread), but also sometimes wore spaghetti strap tank tops. Besides the nice-colored bra straps, I never expected to see anything else. But once I had to ask her something and I could notice that her bra cups were too large for her small boobs (she was obviously wearing one of those heavily padded bras) because I could see between her ches and her bra directly to her nipples! They were pink with a small lightly-colored areola.
Too bad they had cameras at the office, so I couldn't risk taking a picture. But still, the images are in my memory