There's good kite surfing in Cartagena.
Here's a video of the "International Kitesurfing Championship" featuring
Jean-Paul Liechtl (Colombia), Armando Sierra (Colombia), Rafael Leo (Venezuela), Brian Greenvald (USA), Etienne Enote (France)
Armanda Sierra is a really good Colombian kitesurfer. Check out this video of him ripping it up in Cartagena.