Petchaburi's annual Phra Nakhon Khiri - Muang Phet Festival is returning for the 27th year from Mar 28-Apr 6. It will feature a light and sound showcase, beauty pageants (both men and women), cultural performances, exhibitions and an OTOP fair with locally made products. One of the highlights is the star observing activity in honor of King Mongkut, who pioneered astronomy in Thailand and built his summer palace Phra Nakhon Khiri with an observatory. More information at Tourism Authority of Thailand 032-471-005/6.