Indonesia's resort island of Bali is known for its packed beach clubs and streets that bustle with hoards of tourists and traffic, but once a year it enjoys 24 hours of blissful silence. The annual hush descended over the island On March 29 for Nyepi -- a day of silence on the Hindu calendar that is closely monitored by an army of patrol guards called "Pecalang". "It's actually a reminder by our ancestors that you must care about the nature," said one Pecalang. IMAGES AND SOUNDBITES