At first, it was quite dark and hard to navigate. To solve that, I conjure a small fireball on the tip of my forefinger and it acted as a small candle. I thought I would see walls of rocks and stalactites and stalagmites around me but I was fooled. This might be a cavern entrance to some sort of cave but the inside is not in a sense similar to a cave, in fact, it is more akin to a temple hallway than a cave.
The walls seem to have some engravings of some sort however, I can't read it and I don't think I will be able to. They looked like they are foreign words and I have not seen it before. I don't even think of it as a language in our world.