Basalt schist's quarry in Svobodne Hermanice in Czech Republic. Bowser isn't huge and deep; max.depth - 36m, length - 150-200m, breadth - 50m.

Bowser's laying almost on north-south axis so navigation is very simple. Opposite walls create quoin. We're swimming this quoin above a bannister-line between all interesting things, which we can see there.

Although bowser isn't huge and deep, with good clearness (15-20m), is dangerous. Diving accidents happen here every year. One of reason is water's temperature: 3-6C. Good clearness encourages inexperienced divers to deeper diving. Without special plan they can have problems. But if they'll have adequate diving plan and they won't try to pass their private limits, bowser for sure will be nice alternative for our diving expeditions.