Frommer's Review

If you've hired a long-tail boat on the Chao Phraya, stop by this unique museum housing the sumptuous royal barges. These elaborately decorated sailing vessels -- the largest measures over 46m (50 yd.) -- are used by the royal family on state occasions or for religious ceremonies. The king's personal barge, the Suphannahong, has a swan-like neck and central chamber; the boat itself is decorated with scarlet and gold carvings of fearsome mythological beasts.

If you can't make it to the royal barges, there is a smaller display of barges at the National Museum.