Michael Portillo's 2500-mile railway tour of south east Asia reaches its southern most point in Indonesia. His journey crosses the island of Java at the heart of this archipelago nation of 270 million people.In the heaving capital city of Jakarta, Michael uncovers Indonesia's Dutch colonial past and its rich history as a port but discovers its future is uncertain. He negotiates the city's notorious traffic, makes a colourful cycle ride, tries the newly launched MRT metro and dines out on Jakarta's famous street food. He admires Bogor's Botanical Gardens, now a centre for research and conservation, and finds they were developed by an Englishman, Sir Thomas Stamford Raffles, once Governor of Java.