Descripción del sitio
The 2nd longest underground river in the world, it stretches for 15 miles (24 km), 2.6 miles of which is accessible by boat.
SourcesPhoto:
PuertoPrincessa.org Info:
WikiMarker locationPuerto Princesa, Palawan (30 miles north of main city) 10.166667 North, 118.916664 East