▁Lang hor ne , ▁Pennsylvania . ▁It ▁is ▁the ▁only ▁theme ▁park ▁in ▁the ▁United ▁States ▁based ▁entirely ▁on ▁the ▁award - win ning ▁children ' s ▁educational ▁television ▁program ▁Ses ame ▁Street ▁and ▁includes ▁a ▁variety ▁of ▁r ides , ▁shows ▁and ▁water ▁attra ctions ▁su ited ▁to ▁young ▁children . ▁It ▁is ▁also ▁the ▁first ▁theme ▁park ▁in ▁the ▁world ▁to ▁become ▁a ▁cert ified ▁aut ism ▁center . ▁ ▁Ses ame ▁Place ▁is ▁one ▁of ▁the ▁ 1 2 ▁theme ▁par ks ▁owned ▁and ▁operated ▁by ▁Sea World ▁Entertainment , ▁which ▁oper ates ▁the ▁park ▁under ▁an ▁exclusive ▁license ▁from ▁Ses ame ▁Work shop , ▁the ▁non - pro fit ▁owner ▁of ▁Ses ame ▁Street . ▁Ses ame ▁Work shop ▁itself ▁was ▁the ▁park ' s ▁original ▁owner ; ▁the ▁land ▁was ▁sold ▁to ▁An he user - Bus ch ▁in ▁ 1 9 8 7 . ▁ ▁Over view ▁Ses ame ▁Place ▁first ▁opened ▁in ▁ 1 9 8 0 ▁near ▁the ▁Oxford ▁Valley ▁Mall ▁and ▁initi ated ▁the ▁expansion ▁of ▁the ▁commercial ▁complex ▁in ▁the ▁vic inity . ▁It ▁was ▁designed ▁by ▁Eric ▁Mc Mill an , ▁a ▁Canadian ▁designer , ▁Sand ra ▁H anna ▁of ▁Lam bert ville , ▁New ▁Jersey ▁and ▁several ▁other ▁design ers . ▁The ▁park ▁is ▁open ▁from ▁early ▁May ▁through ▁Hall owe en ▁for ▁The ▁Count ' s ▁Hall owe en ▁Spo ok tac ular , ▁and ▁mid - Nov ember ▁through ▁December ▁for ▁A ▁Very ▁Fur ry ▁Christmas . ▁The ▁original