Greater Houston Grotto of the National Speleological Society (GHG) is a 501(c)3 non-profit unincorporated association. GHG purpose is to promote the caving activity from any point of view: research, exploration, conservation and survey. Our club, founded in 1972, consists of members active in Texas and other US states, including caving trips abroad. We are strongly focused on caving operation safety and scientific research.