October 7 2025
Mapping Plunge Pool
Grotto Chairman Carl Haken recounts the trials and tribulations of mapping Plunge Pool cave in the Anza Borrego desert.
Photo: Carl Haken
November 4 2025
The Unusual Caves of Brazil
World-traveling cave surveyors Carol Vesely and Nancy Pistole describe their recent experiences attending the 2025 International Congress of Speleology in Brazil.
Photo: Nancy Pistole
December 2 2025
Gating the Underworld
Professional bat gate contractors Alan Rice, James Rice, and David Angel describe the process of cave and mine gating. Why and how the underground spaces become gated as well as the various techniques used.
Photo: David Angel