On the second day, you can indulge in various outdoor activities and explore the natural beauty surrounding Sumalsag Cave. Start your day with a refreshing hike in the nearby trails, immersing yourself in the lush greenery and enjoying the fresh air. If you are an adventure enthusiast, you can try your hand at rock climbing or rappelling on the cave's cliffs under the guidance of experienced instructors. For those seeking a more relaxed experience, you can opt for a leisurely boat ride on the underground river that flows through the cave. Marvel at the unique ecosystem thriving within the cave as you glide along the calm waters. In the evening, you can enjoy a campfire and stargazing session, taking in the tranquility of the surroundings.