Such journeys would typically start in England and pass through `key' spots such as Istanbul, Kathmandu and Goa. Kathmandu still has a road named Freak Street in memory of the many thousands of hippies who passed (and occasionally still pass) through. Many on the hippie trail were driven by the ideals of 'finding yourself' and 'communicating with other peoples' that often underlay the hippie movement.
The story of Steve Abrams is one good online example of such a journey (see external link below). Abrams left Liverpool on the 3rd of October 1968 and eventually arrived in Darwin, Australia on the 8th of April 1969 and visited Belgium, Germany, Austria, Yugoslavia, Bulgaria, Turkey, Iran, Afghanistan, Pakistan, India, Nepal, Burma, Thailand, Laos, Cambodia, Malaysia, Singapore, Brunei, Indonesia and Portuguese Timor on the way. This journey consisted of over 32,000 km in 181 lifts, train rides, bus rides, ferry crossings and one single plane flight in just over 6 months.