The area east of the Andes includes about 699,300 square kilometers, or three-fifths of the country's total area, but Colombians view it almost as an alien land. The entire area, known as the eastern plains, was home to only 2% of the country's population in the late 1980s. The Spanish term for plains (llanos) can be applied only to the open plains in the northern part, particularly the piedmont areas near the Cordillera Oriental, where extensive cattle raising is practiced.
The region is unbroken by highlands except in Meta Department, where the Serranía de la Macarena, an out lier of the Andes has unique vegetation and wildlife believed to be reminiscent of those that once existed throughout the Andes.

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