The prime reason that makes Tamil Nadu a must-visit on your road-trip bucket list is the East-Coast Road. Stretching all the way from Chennai to Kanyakumari, this charming highway not only makes for a relaxed drive, it also takes you through the ancient city of Mahabalipuram, the former French colony of Pondicherry , the mangrove-forested Cuddalore,the temple-rich Rameswaram, the culture-soaked Madurai (Chennai) and the Indian mainland's southernmost point, Kanyakumari. Great roads and ubiquitous frothing, piping-hot filter coffee make this state a road-trip paradise.