Around The World In 80 Caches The Around The World In 80 Caches geocoins were created by Avroair. This particular geocoin in my collection has an identical twin out in the world competing in the game. Size: 28x38mm Weight: 18.5g on Saturday, 25 November 2006. Posted in GEOCOINS, NON-Round < Prev Next > Related Geocoins Around The World In 80 CachesAround The World In 80 Caches