I'm travelling to Colombia in July for 4 weeks, with 4 friends. We are planning our trip, because we want to take some flights, and book them ahead. And 2 girls are flying back after 2,5 weeks, so (unfortunately) we need to know where we are going to. There are too much places to visit and we can't decide where we want to go.. We are thinking about Bogota - Tatacoa Desert - Popayan - Cali - Medellin (flying to) - Cartagena (Islas Rosario) - Santa Marta - Tayrona - Ciudad Perdida - San Gil - Bogota. Does anyone know if this is possible in 4 weeks and worth the visit?? Or are we forgetting soms beautiful places?