We are heading back south on a five hour bus journey to the town of Puerto Natales in Chile, which is the transport hub for reaching Torres Del Paine National Park. The border crossing takes forever, once for leaving Argentina and then again for entering Chile with a bus load of people having to fill in forms, unloading bags from the bus to be x-rayed and then re-loading. About an hour from the border we arrive at Puerto Natales which is a ramshackle town of ho...