Lake Deep (ディープ湖, "Deep Lake"), also known as Cragg Lake, is the final level from Alex Kidd in Miracle World.
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The lake isn't much a level as it is a playable epilogue. By diving down into the very short underwater area the player will reach a room with a door, where Alex Kidd will insert the Sun Stone Medallion and Moonlight Stone Medallion. On the room inside the player must solve the puzzle to reveal the Gold Crown, stepping on the symbols in the ground in the correct order given by the Hirotta Stone. Once the player picks the Gold Crown, the player will beat the game.