
moderate
4 days
Moderate fitness recommended—able to handle multi-hour boat days, short swims, and boarding small boats; not strenuous hiking.
A four-day loop between Puerto Princesa and El Nido that pairs the subterranean drama of the Underground River with the karst lagoons of El Nido. Expect long transfers, clear water, and hands-on culture stops in between.
The airport humid heat wraps around you like a low tide as the van eases away from Puerto Princesa International. Palms rattle in a trade-wind rhythm and the road opens to scrubby hills that become limestone teeth—karst towers rising from the sea—promising the kind of scenery that makes you forget office lights.

Environmental and terminal fees for the Underground River and El Nido are usually payable on-site—ATMs are limited in Sabang and boat docks.
Puerto Princesa to El Nido is a 5–6 hour road journey; schedule flights and pick-ups with at least a two-hour buffer for check-in.
Sunscreen that’s reef-safe protects coral and keeps the water clear for snorkel photos; apply 15 minutes before entering the water.
Bring sturdy water shoes for jagged limestone and slippery mangrove wharves—flip-flops aren’t enough for cave or rock-hopping sections.
Puerto Princesa’s Plaza Cuartel preserves a World War II memory of prisoners killed in 1944; the city’s cathedral dates to Spanish-era church foundations.
Both the Underground River and El Nido enforce visitor limits and environmental fees—use reef-safe products, avoid touching coral, and carry out all trash.
Protects skin and coral while spending long hours on open water.
summer specific
Useful for sudden tropical downpours during transfers or island stops.
fall specific
Grippy soles for limestone ledges, boat decks, and rocky beaches.
Keeps electronics and documents dry during boat transfers and brief swims.