The lagoon of Guatavita is located in the town of Guatavita, close to Bogota in Colombia, it is known because here the facts of the legend of the dorado took place.
The Uyuni salt flat, located in Bolivia, is the largest salt flat in the world, I recommend visiting it one day when the previous day has rained, brcause a mirror is formed on the ground where the sky is reflected and is an amazing effect. Place where numerous films have also been filmed.
If you are in Bogota, you should visit the salt cathedral in Zipaquira, it is a cathedral located 180 meters deep in a salt mine. It is a place with a lot of history and with incredible constructions down there.