The terrain at the Idukki wildlife sanctuary is characterized by steep mountains, valleys and hills. The artifical lake that is the Kizhakkilachimala Lake adds to the scenic beauty of this lovely wildlife sanctuary. The vegetation at this wildlife park consists of dense forests that include tropical evergreen forests, tropical semi-evergreen forests, meadows and leaf shedding forests. Some of the commonly sighted trees in the region include white pine, kuntherekkapine, vayana, bhadraksham, pali, cheeni, rosewood and meadows of rolling grass.

The perfect time to visit the Idukki wildlife sanctuary for wildlife tours is during the months of December to April.