Using earth orbiting satellites, acclaimed researcher David Flynn has studied the high plateau of Bolivia and found previously undiscovered unnatural patterns stretching outward from Lake Titicaca for hundreds of square miles. The geoglyphic works range from arrow straight parallel lines, enormous over lapping perfect circles and rectangles to 'labyrinth like' systems of walls and mounds extending over every feature of the terrain.
(Via The Anomalist.)
The "unnatural patterns" look like they could indeed be ruins. But are they?