▁to ▁a ▁met ro ▁station ▁Bou lev ard ▁Be aum arch ais . ▁ ▁Station ▁layout ▁ ▁Platform s ▁The ▁stations ▁of ▁the ▁lines ▁meeting ▁at ▁Bast ille ▁all ▁have ▁side ▁platforms . ▁ ▁The ▁station ▁belonging ▁to ▁Line ▁ 1 ▁are ▁very ▁particular ▁for ▁several ▁reasons ; ▁the ▁station ▁of ▁this ▁line ▁is ▁established ▁on ▁a ▁very ▁tight ▁curve ▁and ▁counter ▁curve , ▁partly ▁under ground ▁and ▁part ▁above ▁ground . ▁The ▁western ▁end ▁of ▁the ▁line ▁ 1 ▁platforms ▁have ▁the ▁sharp est ▁curve ▁used ▁by ▁passenger ▁trains ▁on ▁the ▁M ét ro , ▁with ▁a ▁radius ▁of ▁only ▁. ▁The ▁line ▁ 1 ▁platforms , ▁at ▁ ▁long , ▁are ▁significantly ▁longer ▁than ▁the ▁average ▁M ét ro ▁platform ▁length . ▁The ▁latter ▁part ▁over look s ▁the ▁Canal ▁Saint - Martin ▁that , ▁at ▁this ▁point , ▁passes ▁from ▁being ▁under ground ▁to ▁open ▁air . ▁The ▁Line ▁ 1 ▁station ▁is ▁also ▁particular ▁in ▁that ▁the ▁rem n ants ▁of ▁a ▁former ▁narrow ▁island ▁platform ▁are ▁visible . ▁The ▁station ▁is ▁also ▁noted ▁for ▁being ▁the ▁only ▁station ▁in ▁the ▁system ▁for ▁being ▁partially ▁under ground ▁and ▁elev ated . ▁Finally , ▁the ▁tracks ▁and ▁platforms ▁are ▁partly ▁s loped . ▁The ▁ce iling ▁of ▁the ▁east ▁end , ▁which ▁is ▁under ground , ▁consists ▁of ▁a ▁metal ▁deck , ▁the ▁silver ▁be ams ▁are ▁supported ▁by ▁vertical ▁walls . ▁The ▁decor ation ▁of ▁these ▁walls ▁and ▁sp and rel s ▁is ▁" c ult ural " ▁ev