(Jane's PoV)
The most popular thing in City Y was the way the people attached the importance of culture and customs in every spot in City Y. As the city with the densest sense of culture, City Y held many historical and cultural spots that could attract the attention of every tourist.
All they knew that it was a ruin left by our ancestors. It represented the history and the culture of Indonesia. They only knew that it had no function as we spoke other than being a historical ruin for tourism spot.
Little did they know those ancient buildings were there to represent the main city for mystical army assembly in Indonesia. Other countries had one on each of their lands. For example, England had Stonehenge and Egypt had pyramids.