The Lost Civilisation of Peru, BBC Documentary, Horizon

The rise and fall of the Greeks of the Andes. Two thousand years ago a mysterious and little known civilization ruled the northern coast of Peru. Its people were called the Moche. They built huge and bizarre pyramids that still dominate the surrounding countryside; some well over a hundred feet tall. Many are so heavily eroded they look like natural hills; only close up can you see they are made up of millions of mud bricks.