Colombia Trip Coming Soon!

This is my current Itinerary for a Colombia trip I'm taking I'll be there starting Dec 27 and not sure when I'll head back home ( I'm guessing a minimum of 3 weeks). Let me know what you think for those of you who have been. If I add/remove/ replace anything and why? Also, let me know what some of the must-dos :) I'm looking to go on a couple of hikes, party, and visit some cool towns (coffee towns would be nice, and that backpacking community). Thanks in advance!
Cartagena (4 days)
Santa Marta (1-2day)
Parque Tayrona (3days)
Ciudad Perdida (4-5 days)
Minca (1 day)
San Gil or Barichara (2 days)
El Cocuy
Villa de Leyva (1day)
Medellin (4 days)
Guatape (1day)
Jardin (1 day)
Salento (2 days)
Cocora Valley
Nevado del Ruis or Sant Isabel
Cali, Bogota, or Medellin *not sure where to go after this, I've been told Bogota isn't that interesting but this destination will be the place I'll be flying out from.