It is a nature of landscape that the subject(viewer) can build a relation with the object of his or her observation. In other words, a landscape exists in the way in which it comes into the viewer’s inner world so as to become a part of it. This happens insofar as landscape allows the viewer’s free perspectives by virtue of its vast scale whereas still life tends to make the viewer’s perspective fixed in a limited point. This process of relating the subject and the object can be called internalization that occurs in the subject’s mind. This paper aims to highlight the processes of internalization by comparing three Italian writers Dante Alighieri, Giovanni Boccaccio and Giacomo Leopardi, who apply their experiences of seeing landscape to their writings. In his poem “L’infinito”, Leopardi shows how landscape enters into the poet’s mind so as to become a part of it and at the same time remains, as an object, apart from it. This dialectics of the subject and the object generates a sense of infinite space and deep silence in the poet’s imagination of landscape so that he opens up the landscape boundlessly located behind the fence. In comparison with Leopardi, Dante conveys the landscape he perceives into his mind. They may look different from each other but they in fact share the common ground insofar as they end up making their minds participate in the landscape that they perceive and describe. This is so particularly because they create their landscapes through acoustic images rather than visual images. Here it is very important to observe that a landscape created through acoustic images can make us involved into itself more efficiently by virtue of its innated nature of time. The nature of time existed in landscape makes the viewer’s experiences of perceiving or imagining landscape boundless to anything which is again connected with the viewer’s reflective visions. The writer Dante classifies and locates endlessly hell, purgatory and paradise according to his own movement of reflective vision as the pilgrim. In this vision, all the divine worlds are intermingled with each other; Dante’s return to this world is made from that intermingling power. Here we may understand that the salvation Dante intends in this Comedy becomes undeniably realistic and secular. We may say the same about Boccaccio. The garden he postulates in Decameron is absolutely peaceful insofar as it is isolated perfectly from the outside where the black plague are rampant. It looks so similar with Dante’s paradise in that both are perfect places for building up a self-sufficent world which, however, maintains itself by its own relevance with the world of outside. Thus the self-sufficency in Dante and Boccaccio may never indicate a sort of self-completeness; it maintains itself and simultaneously changes always, as Griffin shows itself at the summit of purgatory. This is exactly the common way that Dante, Boccaccio and Leopardi describe landscapes; landscape forms their inner world by making them describing it in the way of internalizing it. In order to explain this point, I pursue the textual analyses about those writers in this paper.