There is lots to see in Fusagasuga.
Check out the Poetry Festival in early April (Spanish required) or The Orchid Festival in March if you want to see some lovely local dress.
They celebrate their yearly anniversary too, and that usually goes on for a week early in the year. Bottom line, Fusa is best visited early on in the year.
As always, bring a camera. And maybe a tape recorder in case you ever find yourself humming that Colombian tune named after the city itself!