Maybe they come across a hidden, magical forest filled with strange creatures. Naruto's curiosity would lead them to explore deeper, and they would have to fight off some dangerous beasts. Along the way, Naruto could also discover new chakra - related secrets within the forest.
There could be a situation where they stumble upon a lost ninja village. This village has been in isolation for a long time and has developed its own distinct style of ninja arts. Naruto and Kakashi would be welcomed as guests, but also get involved in some internal conflicts of the village. They would have to use their skills and wisdom to resolve these issues and in the process, Naruto would gain more experience and understanding of different ninja cultures.