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The Chocolate Hills is an unusual geological formation in Bohol province, Philippines. There are at least 1,260 hills but there may be as much as 1,776 hills spread over an area of more than 50 square kilometres . They are covered in green grass that turns brown during the dry season, hence the name. The Chocolate Hills is a famous tourist attraction of Bohol. They are featured in the provincial flag and seal to symbolize the abundance of natural attractions in the province. They are in the Philippine Tourism Authority's list of tourist destinations in the Philippines; they have been declared the country's third National Geological Monument and proposed for inclusion in the UNESCO World Heritage List. Chocolate Hill

Palawan is an island province of the Philippines located in the MIMAROPA region. Its capital is Puerto Princesa City, and it is the largest province in the country in terms of total area of jurisdiction. The islands of Palawan stretch from Mindoro in the northeast to Borneo in the southwest. It lies between the South China Sea and the Sulu Sea. The province is named after its largest island, Palawan Island, measuring 450 kilometres (280 mi) long and 50 kilometres (31 mi) wide. Palawan Philippines

The Puerto Princesa Subterranean River National Park is located about 50 km north of the city of Puerto Princesa, Palawan, Philippines. It features a limestone karst mountain landscape with an 8.2 km. navigable underground river. A distinguishing feature of the river is that it winds through a cave before flowing directly into the South China Sea. It includes major formations of stalactites and stalagmites, and several large chambers. The lower portion of the river is subject to tidal influences. The underground river is reputed to be the world’s longest. Puerto Princesa Underground River