I've just read about the
Salt Cathedral in Zipaquirá. It sounds like an interesting day trip from Bogota. (It's just 49 km away.) Is it possible to hire a taxi for the day to go? Or are there organized bus tours?
Also, for flights we need to buy within Colombia, is there a particular website with discounted fares? I'm finding $400 RT to Cartagena, or $266 RT to Medellin. I'm not finding any discount for a RT.