▁Tom ▁S aw yer ▁( 1 9 7 3 ). ▁ ▁In ▁the ▁particular ▁movie , ▁the ▁site ▁was ▁used ▁as ▁the ▁cave ▁system ▁where ▁Tom ▁S aw yer ▁( John ny ▁Whit aker ) ▁and ▁Beck y ▁Th atch er ▁( J od ie ▁F oster ) ▁got ▁lost ▁in ▁a ▁cave , ▁as ▁well ▁as ▁Tom ▁S aw yer ▁and ▁H uck le berry ▁Finn ▁( J eff ▁East ) ▁find ▁the ▁hidden ▁gold . ▁An ▁episode ▁of ▁L ass ie ▁was ▁also ▁fil med ▁in ▁this ▁part ▁of ▁the ▁cave . ▁ ▁Mir ror ▁Room ▁The ▁Mir ror ▁Room ▁is ▁a ▁room ▁within ▁the ▁ca vern ▁that ▁contains ▁a ▁stream ▁of ▁water ▁about ▁ ▁deep . ▁However , ▁when ▁a ▁group ▁of ▁lights ▁are ▁turned ▁on , ▁the ▁depth ▁of ▁the ▁water ▁is ▁perce ived ▁by ▁many ▁to ▁be ▁as ▁great ▁as ▁, ▁due ▁to ▁the ▁reflection ▁of ▁the ▁ca vern ' s ▁roof ▁on ▁the ▁und ist urbed ▁water . ▁ ▁Ball room ▁First ▁used ▁in ▁ 1 8 9 0 , ▁The ▁Ball room ▁is ▁a ▁room ▁in ▁the ▁ca vern ▁system ▁that ▁was ▁used ▁in ▁earlier ▁times ▁as ▁a ▁room ▁for ▁square ▁d ances ▁and ▁other ▁community ▁events . ▁It ▁is ▁now ▁one ▁of ▁the ▁first ▁stops ▁on ▁the ▁tour ▁and ▁is ▁used ▁for ▁a ▁few ▁annual ▁concert s ▁by ▁the ▁L ester ▁Family . ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : C aves ▁of ▁Missouri ▁Category : Land forms ▁of ▁Franklin ▁County , ▁Missouri ▁Category