|Location:||Located on the soutwest flank of the Fila de Cal. Ciudad Neily district, Corredores county, Puntarenas province. East of San Rafael Sur, 45m north of the road to Bajo de Indios.|
|Classification:||Karst cave. Tertiary limestones of the Fila de Cal Formation, 60 to 70 Ma old.|
|Dimension:||L=148m, VR=26m, A=240m asl.|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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|1989||first explored by Gordon McCracken and Carlos Goicoechea.|
|1990||surveyed and first class Grade 5 map made by the NSS.|
|1991||used as location for a French movie.|
The entrance of Caverna La Gran Galería is located at the bottom of a 100m long and 70m wide doline. The portal is 33m wide and 15m high, with three access points to the cave passage. The main passage runs for 35m to the west, then 50m to the south.
The cave entrance was locally known, but the cave was first explored by Gordon McCracken and Carlos Goicoechea in 1989. One year later a team of cavers from the United States surveyed the cave and drew a Grade 5 map. At this time the farm were the cave is located was owned by Jorge Vidal, called Chiricano. He sold the farm to a man named Alvin, who started to prepare it as a show cave.