Sabang offers a lot of activities, and there are plenty of accommodations around as well. Among the activities that you may miss if you go on a day trip is the Sabang Mangrove Paddle Boat Tour.
Ugong Rock is usually a stop-over when going to The Underground River. It is a 75 feet limestone formation great for a short cave exploration.
It is not inclusive in the tour packages for underground river though, you need to pay an extra P200 for entrance fee and another P250 – P300 if you wish to experience ziplining.
The reason it is better to get a guided tour to the Underground River Puerto Princesa compared to going there yourself is to save you time and hassle in transport.