A group of hikers ventures through a serene tunnel in Tilden Regional Park, Orinda, capturing the peaceful embrace of nature's architecture. Full Description: On a crisp December morning in 2024, eight adventurous souls are seen navigating a tunnel within the picturesque Tilden Regional Park in Orinda, California. The play of light and shadow creates a captivating scene as the hikers, wrapped in cozy clothing, emerge from the darkness into the greenery beyond. The serene atmosphere is heightened by the blend of natural and human-made structures, invoking a sense of harmony between people and nature. The photo beautifully captures the essence of outdoor exploration during the winter months.