More than the usual river wild

The world's longest underground river system accessible to man is located in the capital of Palawan. The Puerto Princesa Subterranean River National Park, which has been inscribed in UNESCO’s World Heritage List, is Palawan's most popular attraction and covers 5,349 hectares of lush forest, dark mountains, caves, and white beaches. Paddle through eight kilometers of a snaking, underground river leading to a clear lagoon. Walk on the Monkey Trail, a series of wooden paths that winds into the forest, lined with 40,000 tropical flora and fauna.