My submission for Dragons Rise: The Forgotten Realms in the environment production category! For this submission I decided to go with my own design, and not base it of a concept from the design phase of the challenge.
In this world, dragons live in cycles. A dragon can live for centuries, only laying it's eggs right before it dies. The eggs also take many years to hatch, in some cases several generations of human lives.
The actual location itself is a system of rivers flowing through what once was a volcanic area. A labyrinth of ancient lava tunnels, rivers and winding rock formations form the perfect place for a dying dragon to hide it's eggs.