Upon entry there is an outer passage that eventually leads to the heart of the actual ruins, dubbed "The Dragon Ruins". On this path you may encounter a Goblin at times, however.
Inside the ruins Olive can encounter three different dragons. The first is a young dragon that she will encounter should she ever try to enter the official entry. The second could either be a typical dragon or an old dragon. She is best to avoid the typical kind until she is quite prepared.