The Training Dome Lake
Located at the center of the Training Dome this lake is a common place for training and Recreation.
A quiet lake with several small coves and sandy beaches. Beneath the surface is a Labyrinth of flooded subterranean tunnels.
Differant training classes take place almost dayly. These classes include Swimming, Scuba diving, boating and water rescue. The swimming classes are held at the southern beach. A sandy beach with a gradual slope into deeper water. There are several changing rooms on the right side of the shore. A bench at the edge of the waterline. The beach is sheltered from wind and waves by the curve of the shore and the tall trees growing along the edge of the water. Scuba, Boating and water rescue classes all meet at the dock on the south western point. The dock has enough places to tie three boats. There is a clearing on the shore behind the dock, with out houses and a few benches. From the dock the deep water classes take boats out to the center of the lake, which is much deeper than you would expect from a lake that size.
In between classes the lake is a popular place for recreation. Especially a spot known as Shady Cove, on the north west edge. A perfect spot for swimming, picnicing and fishing. There are posted signs that have catch and size limits for all the known types of lake fish. These signs are updated regularly based on current fish populations.
Most of the cave system is completely submerged, there are a few places that runn above the water table. They can only be reached by diving through the flooded sections. While most of the tunnels have been mapped there are a few places hidden by small unpassable tunnel. This has

What a great way to integrate this prompt into your setting. A great idea, and a fascinating secret. As a side note, you wrote differant and may have meant different. Great work my friend!
Your freind,
The Graiffe
Working hard at Summercamp 2026