The temple complex of Borobudur

Borobudur (built 750-850 AD) on the island of Java in Indonesia is the largest Buddhist temple complex in the world.
The nine-storey high step pyramid has a side length of 123 meters. The total length of the complex stretches over 5 kilometers.
The central main stupa at the top has a diameter of 11 meters.
A meditating Buddha sits in each of the 72 seemingly perforated stupas built with lattice stones on the 2 upper levels. 
Originally there were a total of 504 Buddha statues in the entire complex.

When the Merapi volcano erupted in 1006, the temple complex was buried under volcanic ash and fell into oblivion.
It was only rediscovered in 1814.
In 1991, the temple complex was declared a UNESCO World Heritage Site.