You can't see everything in Colombia
Colombia is a large country, and seeing it all would take years, even if you could travel indefinitely. That is to say, you cannot possibly see everything this country has to offer. In fact, Colombia is the only country in South America with both a Pacific and Caribbean coastline. High Andes mountain passes, small pueblos, modern cities, desert landscapes, rolling hills, and vast plains can all be found there. People travel to Colombia for a variety of reasons, including food, culture, nightlife, whale watching, scuba diving, jungle treks, and adventure sports. That is why a lot of people say that tourists cannot see everything in Colombia in a short time!
When planning your itinerary, focus on the highlights of your trip when possible, and if time allows, venture off the beaten path to see something unique. For example, you will have to narrow down your options whether you have six months or six days.