, ▁which ▁have ▁experienced ▁economic ▁dow nt urn ▁and ▁criminal ▁activity . ▁ ▁R ivers ide ▁Park ▁ ▁R ivers ide ▁Park ▁is ▁located ▁near ▁the ▁River west ▁and ▁East ▁Side ▁neighborhood s . ▁The ▁park ▁itself ▁is ▁approximately ▁ 2 5 ▁acres ▁in ▁size . ▁( 1 0 . 2 ▁ha ) ▁R ivers ide ▁Park ▁itself ▁has ▁a ▁rich ▁history , ▁it ▁is ▁one ▁of ▁the ▁three ▁par ks ▁in ▁Mil w au kee ▁that ▁was ▁made ▁by ▁Frederick ▁Law ▁Ol m sted , ▁who ▁was ▁responsible ▁for ▁making ▁some ▁of ▁the ▁most ▁famous ▁and ▁icon ic ▁par ks ▁in ▁America . ▁The ▁park ▁is ▁a ▁mainly ▁temper ate ▁forest , ▁composed ▁of ▁mainly ▁decid uous ▁and ▁broad leaf ▁trees . ▁The ▁Mil w au kee ▁River ▁runs ▁through ▁the ▁park , ▁as ▁well ▁as ▁the ▁Oak ▁Le af ▁Tra il . ▁The ▁park ▁has ▁a ▁wide ▁variety ▁of ▁wild life ▁and ▁is ▁a ▁mig rat ory ▁stop ▁over ▁site ▁for ▁many ▁species . ▁Many ▁bird ▁species ▁live ▁there , ▁such ▁as ▁Great ▁horn ed ▁ow ls , ▁Red - wing ed ▁black bird s , ▁Down y ▁wood pe ck ers , ▁Magn olia ▁war bl ers , ▁and ▁Nash ville ▁war bl ers . ▁The ▁park ▁is ▁also ▁home ▁to ▁the ▁Mil w au kee ▁Rot ary ▁Cent enn ial ▁Ar bor et um , ▁a ▁ 4 0 - acre ▁( 1 6 . 1 ▁ha ) ▁Ar bor et um ▁that ▁was ▁built ▁on ▁a ▁former ▁Brown