What is the temple of Borobudur?

Deep in the heart of Java, Indonesia, there's a mountain made entirely by human hands. It's called Borobudur, and for over a thousand years it has stood as the largest Buddhist monument on Earth — a giant stone puzzle that tells the story of how someone walks the path from ordinary life to enlightenment.
Around the year 800 CE, during the height of the Sailendra dynasty, thousands of workers hauled two million blocks of volcanic stone up a hill and locked them together without any mortar — no glue, no cement, just stone on stone, fitted so precisely the whole thing has survived erupting volcanoes and earthquakes. They were building a three-dimensional map of the Buddhist cosmos.
