The island 's topography is dominated by the centrally - located strato volcano Mount Rinjani making it the third - highest in Indonesia .
Mount Rinjani rises to 3,726 m ( 12,224 ft ) .
The island 's topography is dominated by the centrally - located strato volcano Mount Rinjani , which rises to 3,726 m ( 12,224 ft ) , making it the third - highest in Indonesia .