In May 2017, brothers Ollie and Harry Ferguson launched a plastic pirate ship, the Adventure, into the North Sea at Peterhead, Scotland. It carried a message asking anyone who found it to record their location and return it to the sea. After the ship had visited Denmark, Sweden, and Norway, the crew of a Norwegian ship volunteered to launch the Adventure in new waters, and on Nov. 8 released it 100 miles off the coast of Mauritania, hoping that it would cross the Atlantic westward to the Americas.
It nearly ran aground in the Cape Verde Islands but had made it past Barbados by mid-May. You can track its progress here.