Zamboanga is the longest Philippine peninsula located in Northern and Northwestern Mindanao. It has been strategic during colonial days; however, minimal heritage documentations were conducted. This study identified the heritages in the Peninsula to show its rich history and culture. A survey through days-stay in major towns of each province around the Peninsula enabled to identify heritages that include historic landmarks, buildings, and landforms. Key-person interviews, towns’ profile, archival, and remnants aided the identification. The Peninsula had mixed heritages. The east-to-north bound provinces of the Peninsula (Ozamiz to Dapitan) had numerous Spanish cultural heritages such as forts, churches, houses, cemeteries, and ruins. Excluding Zamboanga City, the south-to-west and north-to-west bound provinces along the bays of Illana, Dumangkilas, Sibugay, and Sindangan were bare, having merely two cultural heritages (Tucuran and Margosatubig’s forts) and two natural heritage heritages. The heritages count more in the east-to-north bound provinces than the two other bounds except Zamboanga City. The former had definite long Spanish experience; the latter had no complete pacification, factor of the absence of built heritages while Subanǝns long remained indigenous. Treating the heritages in the Peninsula as one unified value may produce greater impact to tourism industry.