Today's Heritage Day tour was of the Regard de la Lanterne, part of the ancient aqueduct system of Paris. It was constructed between 1583 and 1613 and has been a historical site since 1899! It's usually closed to the public, but for Heritage Days we were able to go down inside and see the aqueduct draining into it. The photos I took inside didn't come out very well, but here's a photo of the outside.
Afterward we walked down rue de Belleville, through a working class neighborhood with lots of Asians, and stopped at a small restaurant whose menu was primarily limited to pot stickers (raviolis) and soups. We were seated next to a very nice young man from Israel, Yoel. He's studying for his PhD here. We had a very pleasant conversation with him while enjoying our delicious pot stickers.