Largest Sea Cave by Volume

Riko Riko Cave

Poor Knights Islands, Northland, New Zealand · Riko Riko CaveSatellite view · Google Maps

Riko Riko Cave in New Zealand's Poor Knights Islands has a measured total cavity volume of 221,494 cubic metres and was long cited as the world's largest sea cave by volume. A 2024 three-dimensional survey of Klæmintsgjógv in the Faroe Islands reported a larger space, placing the current record holder in dispute.