*Warning maybe TMI*
A horrible repressed memory just came to me. Years ago, I made plans to visit a friend who was attending grad school in Boston at the time. This was in the middle of August. This was my first (and only) visit to Boston and didn't really know my way around. To make a long story short, I finally find her place, used the key she left for me, and opened the door to be welcomed by the most god awful smell ever. There were wood, plastic, and cardboard barriers into the kitchen, living room, and back bedroom. Her bedroom was off to one side, and I hightailed it into there to hide. I then attempted to use the bathroom where laundry was hanging and found that it was the source of the smell.
The bathroom smelled like a park bathroom which hadn't been cleaned in years, with dripping water, mold, walls covered in urine and $&@^ ,and years of homeless making it their home. The heat did not help the smell. Aside from the laundry, the bathroom was NOT messy, but whoa was it one of the nastiest smells on the earth.
Later when my friend arrived home, she told me she barely smelled it, but she had been interning in a hospital so may have been used to unusual smells. The barriers were because they thought they had mice in the house, and her roommates wanted to trap them or keep them out--I can't remember which.
If I had the money, I would have stayed somewhere else, but I didn't and had to wait until my flight a few days later to leave that smell hole. I definitely spent as little time in her place as I could. It really is the only thing I can distinctly remember about Boston and that's sad.