The Iwahig river is located close to the city of Puerto Princesa in the Philippines. The areas along the river are home to dense mangrove forests that can be visited on a boat. Travelers can also watch hundreds of fireflies amidst these forests after the sunset.
There are paddle boat night cruises and short boat trips on Iwahig river for Firefly Watching & touring the Mangrove Forest. The tours range from PHP 1700 per person and take between 2 to 3 hours, depending on the trip type.