I 16 years old and my sister 15 years old. Can I stay in a hotel in Europe?

I think so. If not, just use your parents' ID cards to get a passport or something, and just pretend. Foreign countries are actually quite open. I have an interesting thing to share with you abroad, 2333333. You can stay at home with some people, just like staying in a hotel, without a passport or anything. As long as you give money (ω), you must adopt it. (I'm not sure if it's good, but let's feel it. )