I found a picture online that's similiar...it was labeled as atype of agave, it just amazes me if it is because so many were blooming at once. When we looked at a mountain side it looked like it was covered with trees, but they were really the blooms from these.
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They were also more Green and less blue that the agave's I've seen before.
Something else that made me laugh in Colombia were the restaraunts I saw:
Mario Bross. (like the video game)
Alf (like the 80's TV Show)
Krusty Burger (as from the Simpsons)
All real restaraunts with the cartoons on the signs.