Crazy deep lake seed

[Hanril]

So I rolled a seed that I initially found pretty nice. Green/red/gray rocks around, then plenty of blue clay, forests, ruins with good loot and plenty of surface deposits.

But on one of my casual foraging strolls I found this random bad boy. A lake that goes almost to the bottom of the world, with glowworms and no other light source just below the surface. No way to reach the deepest bottom without drowning. Some lead deposits at the sides. Coords on the screenshot.

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