Which of the following cave systems in New Zealand is known to be a dry cave?

Aranui Cave is recognized as a dry cave system in New Zealand, distinguishing it from the others listed. Unlike the Waitomo Caves and Glowworm Caves, which feature significant water flows and are characterized by their wet environments, Aranui Cave has minimal moisture, making it a dry cave.

While Ruakuri Cave also presents unique geological features and is part of the broader Waitomo Cave system, it typically has more of a damp environment due to underground water sources. Aranui Cave, with its dry interior, offers a different experience for visitors, showcasing stunning stalactites and stalagmites in a less humid setting. This distinct characteristic gives the Aranui Cave its designation as a dry cave, setting it apart from the other options that include varying degrees of moisture and aquatic features.