"It is fitting for me,therefore,to focus on the legend of Aeneas at Cumae, revisit some basic issues pertaining to the locale, and pursue some kind of connections in which any Vergilian passage is endemically rich." Karl Gilinsky
Before Aeneid, Cumae was not the original arriving place of Aeneas in Italy.
"Aeneas' landfall in Italy is essentially Vergils innovation."
Source: Jstor
Aeneas At Cumae by Karl Gilinsky Vergilius (1959-) Vol. 55(2009) pp 69-87
"While Aeneas is admiring the temple, The Cumaean Sibyl accosts him and leads him to her cave. This cave is hollowed out from the rock below the Temple of Apollo,the topography being somewhat similar to that of Delphi."
Temple of Apollo: first built in 7th century B.C., located in Delphi