Sholayar Forest near Chalakkudy, Kerala
This is one of the best routes i have covered.
Cochin – Aluva – Angamaly – Chalakkudy – Athirappally – Vazhachal – Poringalkuthu – Sholayar – Malakkappara – Valpara – Pollachi – Coimbature – Bhavani – Mettur – Dharmapuri – Krishnagiri – Hosur – Bangalore