WAlam-Pedja Nature Reserve is the largest nature reserve in Estonia. It is a vast wilderness area which covers 342 km2 and consists of a complex of 5 large bogs separated by unregulated rivers, their floodplains, and extensive forests. The nature reserve aims to protect diverse ecosystems and rare species, mainly through preserving the natural development of forests and bogs and securing the continuing management of semi-natural floodplain grasslands.
WPaistu Parish was a rural municipality of Estonia, in Viljandi County.
WParika Nature Reserve is a nature reserve in Viljandi County in southern Estonia.
WRubina Nature Reserve is a nature reserve in Viljandi County in southern Estonia.
WSaarepeedi Parish was a municipality in south-western Estonia, in Viljandi County.
WSoomaa National Park is a national park in south-western Estonia. Soomaa protects 390 km², the park was created in 1993. Soomaa is Important Bird Area since 1989 and a Ramsar site of protected wetlands since 1997 and a Natura 2000 area since 2004.
WViiratsi Parish was a rural municipality of Estonia, in Viljandi County.