The Underground River Flows Into The Sea

Puerto-Princesa River flows underground 8km.

Puerto-Princesa Subterranean River National Park lies in Palawan.

The park covers an area of about 22,202 hectares.

An 8.2-kilometer underground river runs through limestone karst.

The river’s lower half is brackish and affected by tides.

Cavern chambers reach 120 meters wide and 60 meters high.

Eight intact forest types grow here from mangroves to montane.

The Palawan Moist Forest hosts the richest tree flora here.

The park contains a full mountain-to-sea ecosystem for wildlife.

Local government manages the park with strong conservation support.

Tourist visits are capped at 600 per day to protect nature.

Water quality stays safe because the whole watershed is protected.

Annual surveys track wildlife to keep the ecosystem balanced.

Threats include agriculture and forest clearing but are managed.

The Puerto-Princesa Subterranean River flows into the sea again.