The heavy cloud which tends to envelop Panama City every afternoon is visible from the ferry some time before we reach the marina, large grey smudges marking cloudbursts and darkening the skies behind the lines of tankers and container ships waiting for their turn to pass through the Canal. Even the Bridge of the Americas looks dark and brooding rather than majestic. Passing through Panama City again – the second of four times we’ll be here due to the shape and layout of the country – we are now very ready for the next stage of this adventure as we collect the hire car and head out of town. Our…