The Cagsawa Ruins is an iconic historical landmark in the Bicol Region of the Philippines. The ruins are the remains of a 17th-century Franciscan church that was destroyed in 1814 during the eruption of Mayon Volcano. The ruins are located in Barangay Busay in the municipality of Daraga, Albay, and are considered to be one of the most popular tourist attractions in the region.

The ruins consist of the church's bell tower, which is the only remaining structure that stands above ground level, and the church's stone walls, which are partially buried beneath the ground. The tower is said to have been used as a watchtower during the Spanish occupation of the Philippines.

The Cagsawa Ruins have been designated a National Cultural Treasure by the Philippine government and are considered to be one of the most important historical landmarks in the country. They have been featured in various tourism campaigns and are a popular destination for tourists who want to learn about the history and culture of the Bicol Region.