Take a must-do UNESCO World Heritage site tour of the Puerto Princesa Subterranean River National Park; tours usually last 4-5 hours and operate from 8:00am to 4:00pm.
Explore lagoons, beaches, and snorkeling spots around El Nido, this popular tour lasts approx. 6 hours from 9:00am to 3:00pm but can be timed flexibly.