Serra Chapel is located in Mission San Juan Capistrano, California, and is known for being the oldest standing building in California. Built in 1782, it was named after Junípero Serra, a Spanish missionary who played a significant role in establishing the California missions. The chapel features beautiful adobe walls and a simple yet elegant design. The chapel is an important historical site, reflecting the early Spanish colonial architecture and the mission's role in the spread of Christianity among Native Americans. Today, it serves as a place of worship and a popular tourist attraction, drawing visitors interested in California's rich history.