Artstation Challenge - The Secret Place

Second concept done for "The Legend of King Arthur" Artstation Challenge for the Environment Design cathegory.
To see the full story of the location you can read it in my submission post: https://www.artstation.com/contests/the-legend-of-king-arthur/challenges/65/submissions/43152
First Concept: https://www.artstation.com/artwork/nQ8z8r