"Inside the City Wall" refers to the central area within the fortified walls of Ayutthaya, an ancient capital of Thailand. This historic district encompasses a wealth of cultural and architectural treasures, including royal palaces, temples, and administrative buildings. It stands as a testament to the grandeur of the Ayutthaya Kingdom, showcasing intricate craftsmanship and vibrant cultural heritage. Visitors can explore the remnants of this once-thriving city, marveling at its rich history and significance as a UNESCO World Heritage Site.