Transport for London - London Underground Map 1000 Piece Jigsaw Puzzle Have fun recreating this spectacular image of the London Underground with the 1000 puzzle pieces provided. Piece together the map starting in Amersham all the way down to Woolwich. Ideal for: A fantastic jigsaw puzzle that will give hours of entertainment for all, the perfect challenge for game night. Finished puzzle measures: 75cm x 50cm 1000 piece.