Loy Krathong Sai, Thailand's Festival of Lights, is a beautiful nighttime event, where Thai’s float ornately decorated Krathongs illuminated with candles, incense, and other decoration. In Tak province Loy Krathong is celebrated with unique custom of threading coconut shell Krathongs together and floating them in a candlelit chain down the Ping River from the 200 year-old Rattanakosin Bridge.