Solana, officially the Municipality of Solana, is a municipality in the province of Cagayan, Philippines. According to the 2020 census, it h…Solana, officially the Municipality of Solana, is a municipality in the province of Cagayan, Philippines. According to the 2020 census, it has a population of 88,445 people. The Awidon Mesa Formationa Paleolithic Sites of the municipality, along with the Callao Limestone Formation Paleolithic Sites neighboring Penablanca, are included in the tentative list of the Philippines for future UNESCO World Heritage Site inscription under the name of Paleolithic Archaeological Sites in Cagayan Valley. The Awidon Mesa Formation has at least 68 Paleolithic sites which yielded stone tools and fossils of extinct animals that include stegodons, elephants, rhinoceros, and large tortoise.