The old Colonial Center of Bogota, La Candelaria, has changed a lot since my last visit in 2009, and no longer has this rundown feeling with many decrepit Colonial Houses. It has undergone a major restoration process in the last years (which is still underway, actually). You now find beautifully restored, colorful one story Colonial Houses that board narrow cobblestone streets.
If you are interested in Street Art, then spend enough time in Bogota! They claim to be the Capital of Street Art in Latino America… No matter if exaggerated or true, you will find some very nice samples of militant, high quality Street Art there!