India lies at the heart of south central Asia. It has the second largest population in the world and over 700 languages and dialects. From the snow covered Himalayas in the north, to the idyllic beaches of the south, India is a land of unparalleled contrasts and constant adventure. Andrew Daddo visits northern India travelling from the holy river Ganges in Varanasi to the lost city of Leh. Traveller Holly Morris then moves east to Darjeeling and Calcutta before heading for the peaceful Andaman Islands. Moving south Justine Shapiro visits vibrant Madras before exploring the lakes and waterways of Kerala's coast. Finally, in west India, Megan McCormick travels through Goa, Bombay and Mumbai.