Understanding 'Tranquil' in Context

During winter break, Alex decided to visit his grandparents in the countryside. He was thrilled to stay in their cozy cabin, surrounded by tall pine trees. Every morning, he would wake up to the crisp, chilly air and the sound of birds chirping outside. One day, while exploring the snowy woods, Alex stumbled upon a hidden stream. The water glistened under the sunlight, and he felt a sudden sense of adventure as he followed its winding path.

As he walked, he noticed how tranquil the surroundings were. The quietness was only broken by the occasional rustle of branches. Feeling invigorated, he began to collect some pinecones to take home as souvenirs.