Picture palm trees 60 meters tall —the tallest on Earth— rising from a green valley wrapped in mist. This is the Cocora Valley, deep in the Coffee Region. You walk among the wax palms, Colombia's national tree, while hummingbirds buzz around you and the air smells of freshly roasted coffee. The roughly four-hour hike crosses cloud forest, rivers and lookout points. A landscape that hardly seems to belong to this planet.