Actress Joanna Lumley details her trip of a lifetime: a 4,000-mile trek up the Nile River all the way to its source, the swampy highlands of Rwanda. We'll hear how the river's personality varies over its course — past Cairo and Luxor, through Sudan and Lake Victoria — and about the sights she saw and people she met along the way. Plus, listeners share surprises they encountered on their own memorable adventures around the world.