The other main way to get around is by Collectivo. These are small buses that have numbers and signs saying their destinations. You flag them down on the street and pay less than 1 USD for a ride. Generally speaking you enter from the front and exit from the back. The only way to stop the Collectivo is to push the "stop" button located almost always at the back of the bus. If you get a seat, one nearest the back exit is the smartest choice because they can become crowded sometimes. They are less organized than The Transmilenio but they will get you almost anywhere. They do not have proper stops, it is just hop on hop off. Also, they have people coming on and off the buses trying to sell you their wares. You are by no means forced to buy anything though, it is purely optional.
Bogota is laid out in a grid system. It is a little complicated at first, but once you get used to not using street names and just numbers it is pretty easy. The city is surrounded by mountains to the East. You always know you are looking East if you see the mountains and Monserrate the Church on the top of the mountains overlooking Bogota. At night you will see many houses burrowed into the hills and lit up with many lights. If you see that, you are going AL Sur (To the South). The Calle's of Bogota run parallel to the mountains from South to North. They are abbreviated as CL or CLL.
The Carreas run from East to West and cross the Calle's perpendicularly, they are abbreviated as Cr,Kr or Crs. Avenidas are abbreviated as Av. They are main or larger streets and sometimes have names but also numbers. For example, Av. Boyaca is also called Carrea 72. Each address in Bogota consists of the Calle,Carrea and house or edificio (building) number. an example would be Carrea 42 # 15-34. This means that the house is on Carrea 42, Calle 15 and the actual house number is 34.
Villavicencio. Both of the above pictures were taken in the Villavicenio region by yours truly.
Well I hope you enjoyed my brief newcomers guide. Your friendly neighborhood Gringo,Tyler