(The Maya temple of Kukulkan, the feathered serpent and Mayan snake deity, is seen at the archaeological site of Chichen Itza, in the southern Mexican state of Yucatan, in this picture taken May 3, 2012 and made available to Reuters on December 17, 2012. REUTERS/Mauricio Marat/National Institute of Anthropology and History )

A few words by an American scholar, a crumbling Mexican monument and the love of a good yarn were all it took to spawn the belief that the world could end this week.

December 21 marks the end of an age in a 5,125 year-old Maya calendar, an event that is variously interpreted as the end of days, the start of a new era or just a good excuse for a party.

Thousands of New Age mystics, spiritual adventurers and canny businessmen are converging on ancient ruins in southern Mexico and Guatemala to find out what will happen.

“No one knows what it will look like on the other side,” said Michael DiMartino, 46, a long-haired American who is organizing one of the biggest December 21 celebrations at the Maya temple site of Chichen Itza on the Yucatan peninsula.