Huge creations obviously meant strictly for aerial viewing,

many not discovered until the advent of human flight
 

 Nazca
 

The Nazca Desert is a high plateau about sixty miles long and five miles wide on the coast of Peru, some 250 miles south of Lima. On the Nazca plateau there is a collection geoglyphs, drawings on plateau basin and surrounding mountains, that can only be defined from a high altitude, and cannot be distinguished from the ground. These lines are laid out across the plateau for more than 800 miles. Some of the lines extend for 12 miles. There are many lines, objects, and several kinds of figures, such as fish, birds, monkeys, a whale, spiders and plants. Since these lines are on a flat surface and its climate is extremely dry, nearly all geoglyphs remain completely intact.

Nazca

Legend Map

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Trapezoid