▁park ' s ▁total ▁power ▁demand . ▁ ▁During ▁its ▁early ▁years , ▁Val hal la ▁featured ▁further ▁py rote chn ic ▁effects ▁such ▁as ▁' light ning ', ▁explos ions ▁and ▁fl ames . ▁These ▁have ▁become ▁reduced ▁after ▁a ▁de cade ▁of ▁operation . ▁ ▁In ▁May ▁ 2 0 0 4 , ▁a ▁fire ▁which ▁dam aged ▁the ▁Grand ▁National ▁roll er co aster ▁and ▁the ▁Alice ▁in ▁Wonder land ▁dark ▁ride ▁was ▁ex ting u ished ▁using ▁some ▁of ▁Val hal la ' s ▁huge ▁water ▁content . ▁ ▁Val hal la ▁was ▁closed ▁towards ▁the ▁end ▁of ▁the ▁ 2 0 1 1 ▁season ▁to ▁under go ▁ref urb ishment . ▁Not ably ▁the ▁fac ade ▁structure ▁was ▁replaced ▁in ▁its ▁entire ty , ▁including ▁removal ▁of ▁the ▁shop , ▁a ▁new ▁exit , ▁a ▁replacement ▁" f aux - rock " ▁fac ade ▁and ▁rest oring ▁the ▁water fall . ▁ ▁Inside , ▁some ▁changes ▁were ▁made ▁to ▁the ▁effects ▁and ▁scenes . ▁ ▁The ▁T es la ▁co il ▁light ning ▁room ▁was ▁completely ▁removed ▁and ▁replaced ▁with ▁ 2 ▁Vik ing ▁ske let ons , ▁a ▁large ▁car ved ▁Val hal la ▁sign ▁and ▁las er ▁effects . ▁ ▁The ▁sound ▁of ▁light ning ▁remains ▁in ▁this ▁area . ▁ ▁The ▁ride ▁music ▁system ▁was ▁also ▁improved ▁for ▁better ▁coverage ▁throughout ▁the ▁att raction . ▁The ▁ride ▁re - open ed ▁on ▁ 5 ▁May ▁ 2 0 1 2 . ▁ ▁Music ▁ ▁The