Join early explorers as they set sail to discover that - Holy Cow! - the world is actually round! This spectacular three-dimensional jigsaw puzzle defies gravity as it forms a spherical miracle! Antique design is based on real ancient mariners' charts! The pieces are specially designed to create an actual sphere. The last piece - the North Pole piece - has a trap door that snaps into place when you're done! Puzzle includes 530 pieces, a display stand, and piece by piece instructions. Time to sail around the world! Finished puzzle is 9.5 in diameter.