Kon Tiki Expedition, but during my school days we were captivated by the story of Thor Hayerdahl and his crew on their voyage across the pacific ocean.
This is what is known as a semi-modern postcard. Often in black and white and sometimes in colour, they are gaining in popularity as people remember how things used to be when they were young through the postcards.
At this very moment there is a modern expedition, An-Tiki, led by an 84 year old to raise money for Water Aid. They set off on January 30th and are crossing the Atlantic ocean. There is an An-Tiki blog and website.