Meaning of 'Serene' in Context

In the small town of Maplewood, the vibrant community center was bustling with activity. Children were running around, laughter filled the air, and adults were engaged in animated conversations. The center hosted various events each week, creating a lively atmosphere that brought everyone together. However, amidst this joyous scene, there was a serene garden tucked away in a corner. This garden, with its blooming flowers and tranquil sound of water trickling from a small fountain, provided a peaceful retreat for those who sought solace from the bustling activities of the community center.

In the above passage, the word 'serene' describes the garden. What does 'serene' mean in this context?