Candelaria is the old, historic part of Bogotá and houses the majority of the things any traveler to Bogotá would want to see. Plaza Bolívar, the Gold Museum, Monserrate, Botero Museum, Calle del Embudo, the less well-known La Candelaria Park and Journalist Park, which is the location of the TransMilenio station Jimenez.
There are a couple of ways you can see Candelaria. You can just go there by yourself or you can join one of the many free walking tours. I recommend taking a walk tour to orient yourself and get some tips from the tour guide! Unfortunately, Candelaria and in particular the famous Calle del Embudo, is known to be an area where tourists are at risk of being pick pocketed. Not because the neighborhood itself is unsafe, although there is a lot of visible poverty, but as it is central and attracts tourists, it also attracts pick pockets.