The mighty river Indus has marked the final frontier of Alexander’s great empire. Little did he know, that this river has seen a great civilization flourish on its banks, three thousand years before he invaded from the Khyber Pass. The land, which is now Pakistan, was the centre of Buddhism, a seat for the Mughal emperors and home to the mystic Sufis. To its north, majestic mountains clad with eternal snows gave way to the southern branch of the once-fabled Silk Road. Exploring Pakistan, its diverse peoples, festive cultures, towering mountains, deserts and lush plains is like exploring the secret of Asia.