British West Indian Airlines (BWIA)
BWIA, nicknamed BEE-WEE (now Caribbean Airlines) is the national airline of Trinidad and Tobago and serves the whole of the Caribbean. Its network once stretched much further including flights to the UK where its Airbus A340s were once a common sight at Heathrow. The airline published a few maps and one specially stands out, designed to mimic the look of a treasure map. How great is that.