▁attract s ▁many ▁visitors ▁every ▁year . ▁Now ad ays ▁an ▁important ▁att raction ▁is ▁also ▁the ▁musical ▁show ▁and ▁the ▁fire works ▁on ▁Saturday ▁evening ▁on ▁the ▁N ieu we ▁Ma as , ▁near ▁the ▁Er as mus ▁Bridge . ▁The ▁locations ▁are : ▁the ▁N ieu we ▁Ma as ▁as ▁a ▁demonstr ation ▁area , ▁Kat endre cht , ▁Wil hel min ap ier , ▁Wil hel min ap lein , ▁Wille ms ple in , ▁Wille m sk ade , ▁Ve er ka de ▁at ▁the ▁Ve er h aven , ▁West er ka de ▁and ▁Park ka de . ▁The ▁International ▁Sh ant y f estival ▁Rot ter dam ▁will ▁also ▁take ▁place ▁during ▁the ▁event . ▁Many ▁sh ant y ▁cho irs ▁from ▁all ▁over ▁the ▁world ▁will ▁perform ▁at ▁various ▁locations ▁in ▁the ▁O ude ▁H aven ▁and ▁Le uve h aven . ▁Reg ular ▁participants ▁are ▁the ▁prov iders ▁of ▁port ▁services , ▁such ▁as ▁t ugs , ▁pil ots , ▁row ers , ▁water ▁ships , ▁and ▁so ▁on . ▁The ▁Port ▁Author ity , ▁the ▁Sea ▁Police , ▁Custom s ▁and ▁the ▁Royal ▁Navy ▁are ▁also ▁always ▁present . ▁The ▁number ▁of ▁visitors ▁runs ▁into ▁the ▁hundreds ▁of ▁thousands , ▁but ▁also ▁depends ▁on ▁the ▁weather ▁conditions . ▁For ▁example , ▁there ▁were ▁ 4 5 0 , 0 0 0 ▁in ▁ 2 0 1 4 , ▁but ▁due ▁to ▁bad ▁weather ▁' only ' ▁ 3 2 0 , 0 0 0