vortex springs

Does anyone know how far it is from the opening of the tunnel to the piano room? I know the depth gets to 100ft as u follow the pipe back to the locked gate. .. But I have yet to see an entire YouTube video from the tunnel to the piano room or the estimated time..... Thx

The question of "what certifying agency is the best" gets asked often, and everyone has their opinions. I wonder what the actual numbers would say, if they were tracked? I know lots experienced divers who dive on a regular basis, but I know hundreds of people who got Open Water certified and...