Exploring the harbor of San Juan in Puerto Rico and you notice an old man pottering around on a mysterious vessel. As you get nearer, he greets you and tells you about his homemade submarine. He built it, he says, to be able to hunt for sunken wrecks in this area. Sadly, he is now too old to take the submarine down himself. When he offers you the opportunity to take a dive you excitedly agree. You listen as she quickly explains how everything works, you get on board, and dive down.
Very soon after diving below the surface, something goes wrong: the old boat breaks down and you sink, out of control, to the seabed. The main pressure line has blown and the engines have stopped running. What will you do to survive? Piece together the 759 pieces and solve the riddles to save your life!                 

This is extra-challenging, because the puzzle image isn't the same as the box top picture, and you have to decipher the clues on the in-box leaflet too. You can get extra clues by scanning the QR code - and if all else fails, use the final answer provided in the sealed envelope. Can you discover the mysteries hidden within the puzzle and live to see another day?

High quality 759 piece cardboard jigsaw puzzle.

The finished puzzle measures 70 x 50cm when complete.

Suitable for ages 12 years and up.