Kayangan Lake is considered the cleanest lake in the Philippines with its crystal-clear water. A short trek is required to reach it, but it's worth it for the amazing view of the island.
Mount Pinatubo is an active volcano with a stunning crater lake. You'll undergo a 6km trek across rivers, valleys, and lahar canyons to get to the peak, but the reward is worth it.
The Puerto Princesa Underground River is a UNESCO World Heritage Site and one of the most impressive natural wonders in the Philippines. The tour takes you through an underground river full of limestone formations.
Siargao is a surfer's paradise with serene beaches, blue lagoons, and palm trees. You can learn to surf or paddleboard, and there are plenty of boat tours to take.
Kawasan Falls features a stunning light blue lagoon and three cascading waterfalls. It's a popular spot for swimming, jumping, or taking bamboo rafting tours.
If you have more days, opt to stay longer in Siargao Island as it has plenty of natural attractions to offer. You can also do island-hopping tours in Coron and Cebu, or enjoy the nightlife scene in Puerto Princesa. If you have less time, skip Kayangan Lake, Mount Pinatubo, or Kawasan Falls depending on your interests.