▁each ▁year ▁would ▁have ▁a ▁theme ▁to ▁tie ▁all ▁the ▁activities ▁together . ▁In ▁the ▁aut umn ▁of ▁ 1 9 6 8 , ▁O lave ▁Baden - P ow ell ▁made ▁what ▁would ▁be ▁her ▁last ▁visit ▁to ▁Our ▁Ch alet . ▁ ▁Our ▁Ch alet ' s ▁ 4 0 th ▁anni versary ▁was ▁celebrated ▁on ▁ 3 0 ▁July ▁ 1 9 7 2 . ▁ ▁By ▁ 1 9 7 2 , ▁over ▁ 3 3 , 0 0 0 ▁people ▁had ▁visited ▁Our ▁Ch alet . ▁Many ▁improvements ▁were ▁made ▁to ▁the ▁building ▁and ▁the ▁grounds ▁in ▁the ▁ 1 9 7 0 s . ▁Tow ard ▁the ▁end ▁of ▁the ▁de cade , ▁Our ▁Ch alet ▁began ▁a ▁fund ▁to ▁join ▁the ▁community ▁se w age , ▁which ▁was ▁eventually ▁used ▁in ▁September ▁and ▁October ▁ 1 9 8 6 . ▁During ▁the ▁ 1 9 7 0 s , ▁cross ▁country ▁ski ing ▁in ▁Adel b oden ▁became ▁more ▁popular , ▁and ▁in ▁ 1 9 7 8 ▁the ▁" Ch alet ▁Challenge " ▁award ▁( see ▁Activ ities ), ▁which ▁is ▁only ▁available ▁to ▁Our ▁Ch alet ▁visitors , ▁was ▁established . ▁ ▁Isabel le ▁D uf our ▁of ▁Switzerland ▁replaced ▁In ge ▁in ▁ 1 9 7 5 , ▁and ▁was ▁in ▁turn ▁replaced ▁by ▁H anna ▁New port , ▁also ▁of ▁Switzerland , ▁in ▁April ▁ 1 9 8 0 ▁when ▁she ▁returned ▁to ▁n urs ing . ▁In ▁the ▁spring ▁of ▁