Puerto Princesa Subterranean River National Park

Worth it if you're after a genuinely unusual natural sight and don't mind paying for it—the 4.5-star rating from nearly 800 reviews suggests the underground river delivers. Go early in the day to dodge tour groups, and book through one of the 58 available experiences rather than winging it, since entry's ticketed and timing matters.

Written by us from the live data above — never copied from anywhere. Ratings and counts update from Viator.