Colombia Unlimited
Travel consultants provide customized travel plans as well as orientation and guides. Includes overview of destinations throughout the country. (Requires Flash.)
Executive Planet - Colombia Business Etiquette
A guide to Colombian business culture and protocol.
Journeymart.com - Colombia Travel Guide
Destination and travel information on Colombia, its sights and people. History, economy, need-to-know facts, when to go, and things to see.
TravelGIS.com - Colombia
Travel guide for the country and its major cities with maps, reservation, airfares, and car rentals.
US State Department - Colombia Consular Information Sheet
Offers Background Notes and travel information including entry and exit requirements, safety and security, crime, health and transport.