Nag Panchami is a festival dedicated to serpents and is mostly celebrated in all parts of Maharashtra, West Bengal and many other, this festival comes in the month of July or August.
You could never come back disappointed if you visit the places in Panchgani- the land of the five hills. Just go there, enjoy and come back to endorse my view.
Trimbakeshwar is one of the holiest place not only in Maharshtra but also all over India, in close proximity to Nashik, it also comes under the twelve Jyotrilingas.
Parli Vaijnath is the temple having its location in the Beed district of Maharshtra that is 110 kilometres from Nanded and this temple also comes under the list of 12 Jyotrilingas.