The Vanished Tunnel of Mirror Lake

Scuba divers of Reddit... what’s the deepest you’ve ever gone before you realized

you weren’t alone down there? <break time="1.0s" /> I’ve been diving for years. Nothing extreme.

Just local lakes and flooded quarries. There’s one we call Mirror Lake. It’s always still.

No ripples. No wind. Just glass. <break time="1.0s" /> Last year, I went there alone.

Testing a new dive light. About fifteen meters down, I saw something

strange. Not rock. Not wreckage. A tunnel. Perfectly smooth.

Like it was carved. <break time="1.0s" /> I thought it was a drain shaft. I swam closer. Then my depth gauge

started glitching. Sixteen meters. Thirty-two. Forty-seven. Zero.