The Golden Flyer
Several of these artifacts are on display at the "Museo del Oro" in Bogota, Colombia (Room 2, second floor) where have been catalogued as "figurines of winged animals" made by the Tolima culture between I B.C. and VIII A.D.
Their origin has been mistakenly attributed to other cultures like the Incas and Quimbayas.
The two golden flyers depicted in this video, have been subject of great speculation since they were found and are believed to be evidence of the ancient culture's knowledge of flight well before modern times. Whilst thought to be an insect or bird by some, others considered the possibility that it was, in fact an aircraft. The models have a tail, stabilizers, wings and a plane-like body or fuselage which, in our reality, don't resemble any insect or bird at all. They do lack representation of "engines" of some sort though.
In 1994 German aviation experts Peter Belting, Algund Eenboom and Lübbers Conrad built a scale model replica and named it GoldFlyer I. They carefully built the model to an scale of 16:1 and added an engine and landing gear, proving that this model could really fly. The original flyer can be seen at the Smithsonian Institute here.
How did the Tolimas have knowledge of aero-dynamics or flight design? One Ancient Astronaut theory is that they witnessed alien airplanes/spacecraft and recreated models of them in gold, thus the Tolimas of Colombia were goldsmiths par excellence who created varied artifacts inspired by forms from their environment.