The Cuartel Ruins stand along the coast of the municipality of Oslob on the island of Cebu. It was built by Spaniards back in the 1860s when the Spanish forces colonized the Philippines. The edifice was constructed using thick coral stones that still stand today.

It was intended to serve as the residence of Spanish troops in the area. However, the construction was never completed as the Spanish army quickly fled when the American troops arrived in Cebu. Today, the ruins have become a major tourist spot thanks to their picturesque appeal. It is also recognized as one of the top heritage sites in Oslob.