I didn't just visit museums in Hatay. I also visited perhaps one of Christianity's oldest churches.
The Cave-Church of St. Peter is located on a mountain. Hatay has a wall of mountain on one of its sides, essentially generating the border to Syria. And on this geographical feature, a church was carved into it. This became the Cave-Church of St. Peter. It's a small affair, but at least it provides amazing views of the city.
I walked from the city centre to this place, which took about half an hour. I could have taken public transportation, but as I haven't been exercising lately, I figured it wouldn't hurt to just walk. I had to chase away some stray dog but that wasn't really an issue. In any case, I reached the mountain, and saw some amazing views given the height.
There is a small entrance fee, but since I had a ticket that allowed me to see a combination of Hatay's sights, I just flashed this ticket and I was let in. As I mentioned earlier, it is a small church, but I suppose everyone starts small, isn't it? According to the story, Antioch (modern-day Hatay) was significant given its connection to early Christianity, so this place definitely had some importance back then. Nowadays, I don't know if there are still church services happening, but in any case it's an interesting place to check out.