Now is the time to go on a subcontinental safari. The monsoons are gone, the danger of flooding has passed and the air begins to cool. Tigers are just one of the many delights that await nature lovers in India: elephants, wild boars, cobras and bears also abound. The best way to catch the country's extraordinary fauna is to plan a two- or three-day trip to one of India's numerous national parks, where jeep and elephant-back safaris will take you deep into the forest. Four of the best national parks are listed below; a few days spent in any...