article_snippet.sent: Chunks of volcanic rubble jut out up from the stepped hillside, which is considered sacred by the Sundanese people who live locally.
article_snippet.sent: Dr Danny Hilman suggests that it may have been built for worship or astronomy.
article_snippet.sent: Chunks of volcanic rubble stick up from the stepped hillside (pictured), which is considered sacred by the Sundanese people who live locally. 
article_snippet.sent: But both civilisations built them for religious reasons.
article_snippet.sent: the stepped site is thought to have been built for worship or astronomy .