aut la ▁de ▁Jim enez , ▁H ua ute pec ▁and ▁Maz at lan ▁Villa ▁de ▁Fl ores . ▁ ▁History ▁In ▁ 1 9 6 5 ▁ca vers ▁from ▁Austin , ▁Texas ▁expl oring ▁the ▁Sierra ▁Maz ate ca ▁mountains ▁found ▁several ▁large ▁c aves ; ▁During ▁the ▁ 1 9 6 0 s ▁North ▁American ▁ca vers ▁subsequently ▁gathered ▁survey ▁data ▁and ▁generated ▁maps ▁which ▁showed ▁their ▁proxim ity ▁to ▁each ▁other . ▁Over ▁time ▁the ▁S ót ano ▁de ▁San ▁Ag ust in ▁was ▁found ▁to ▁be ▁connected ▁to ▁La ▁G ri eta ▁and ▁N ita ▁N anta , ▁and ▁eight ▁more ▁cave ▁ent ran ces ▁were ▁discovered . ▁It ▁became ▁clear ▁that ▁they ▁belonged ▁to ▁one ▁cave ▁system , ▁S istema ▁Hu aut la . ▁ ▁it ▁is ▁known ▁to ▁have ▁ 2 0 ▁ent ran ces . ▁ ▁In ▁an ▁expedition ▁in ▁ 1 9 7 7 , ▁the ▁deep est ▁point ▁of ▁the ▁cave ▁system ▁was ▁discovered ▁after ▁st aging ▁multiple ▁under ground ▁cam ps , ▁a ▁flo oded ▁tunnel ▁at ▁ 1 3 2 5 ▁meters , ▁known ▁as ▁the ▁San ▁Ag ust ín ▁sum p . ▁Sub sequ ent ▁sc uba ▁div ing ▁exped itions ▁in ▁ 1 9 7 9 ▁and ▁ 1 9 8 1 ▁proved ▁log ist ically ▁ins u fficient ▁to ▁transport ▁equipment ▁to ▁explore ▁it ▁further . ▁In ▁ 1 9 9 4 , ▁during ▁a ▁ 1 3 5 - day ▁expedition ▁of ▁ 4 4 ▁people , ▁mostly