sentence1: Flanked with patches of forest leading up into the foothills of the Himalayas, the flat plain stretches right across to the Bay of Bengal 1,600 km (1,000 miles) away, but some areas are kept as nature reserves for the country's wildlife, notably its tigers, leopards, and elephants.
sentence2: Some areas frmo the foothills of the Himalayas to the Bay of Bengal are kept as nature reserves.