Three Origin Theories

Noticing something was eerie about Lost Isle Alley, Leon's first thought was to retreat. In the face of the unknown, only fools would proceed without preparation.

"Baron Grant, your loyalty, I accept! We are leaving!"

"Thank you, Your Highness!" Baron Grant bowed solemnly and obliged.

Outside Lost Isle Alley, Leon had Baron Grant accompanied him as they circled the outer perimeters of the three old buildings. 

"Tell me everything you know about this place."

"Yes, Your Highness." 

Noticing the sternness in the prince's tone, Baron Grant also became solemn. 

"From what I know, there are four bizarre points about this area. Apart from not being able to see the sky inside, there is one occasion when it can be seen, and that is during the night of a full moon. Moonlight would shine down on the center of Lost Isle Alley."