Simplify the following text for a Grade 9 native English-speaking person.
Original: The municipal area is 493 kmÂ , with a mountainous territory within the Central Cordillera of the Andes and watered by the rivers Cauca and Tonusco .
Simplified: The municipal area has a mountainous territory within the Central Cordillera of the Andes and watered by the rivers Cauca and Tonusco . Its area is 493 kmÂ .