The northernmost province, Chiang Rai is 785 km north of Bangkok and is 580 m above sea level. It is one of the more rural parts of Thailand, where natural jungle and farm lands cover much of the landscape. The more mountainous areas, where many crops won't survive have over the past, given their lands to the cultivation of poppies, which were used in the making of opium and until recently this was Chiang Rai's main source of income other than tourism. This trade, due to the clamping down of law enforcement in the area, is now all but gone and Mayanma (Burma) and Laos are now the prime producers this narcotic, though the area is still considered part of the famed 'Golden Triangle'.