Nojpetén had defensive walls built upon the low ground of the island; they may have been hastily constructed by the Itza at a time when they felt threatened either by the encroaching Spanish or by other Maya groups.
Nojpetén memiliki tembok pertahanan yang dibangun di dataran rendah pulau dan kemungkinan dibangun secara tergesa-gesa ketika mereka merasa terancam oleh serangan bangsa Spanyol atau kelompok Maya lainnya.