What original building are still standing at San Juan cripistrono?

At San Juan Capistrano, several original buildings still stand, most notably the Mission San Juan Capistrano itself, founded in 1776. The historic Serra Chapel, the oldest building in California still in use, remains a significant part of the mission complex. Additionally, the ruins of the Great Stone Church, which was completed in 1806 but collapsed in an earthquake in 1812, are also preserved on the site. These structures highlight the rich history and architectural heritage of the area.