The Royal Barge Procession is a great event put on for various royal and religious events. It usually happens each year following the 3 month Buddhist Lent. You are not supposed to view the procession from buildings or bridges so most people flock to riverside restaurants for a look. The good thing is they do a few practice runs so there are lots of excuses to find a good seafood restaurant with cold beer and watch it all pass by. Here are a few shots.
^The Royal Barge Anantanagaraj (I think)