The speaker describes what is colloquially known as the "Roman Wall," or "Rimskata stena," clarifying that it is an Ottoman-era structure several centuries old. It is situated in Sofia's Lozenets neighborhood, near the city center, surrounded by small streets, a café, a Chinese restaurant, and a university faculty. The wall itself is noted as not very thick, constructed from stone and brick with grout, and is considered quite impressive. On the other side of the wall, a market operates, particularly busy on Saturdays, which was the primary reason for the speaker's visit. The market features very nice sellers offering excellent products. Specific vendors mentioned include a monk in black, and a man in red and white from whom they purchase "fantastic apple cider vinegar and delicious local and organic apples."