PROFIL Maps; google maps link (*only for information) Name; Siais Lake; Note; Lake Siais is the second largest lake in North Sumatra after Lake Toba. This lake is a habitat for jurung (tor ssp.) Which is sacred to the surrounding residents.… Conservation; … GOVERMENT ADMINISTRATION Province North Sumatra; City/Regency Kabupaten Tapanuli Selatan District Kecamatan Angkola Sangkunur; Kecamatan