The specail building in there, that you sould not miss there are...
1. Siwamokhaphiman Hall - This building was built when the Prince Successor to King Rama I, MahaSurasinghanat, built the Palace of the Prince Successor. Originally used as an Audience Hall, it now houses the Thai History Gallery.
2. Buddhaisawan Chapel - The chapel was built in 1787 to house the important Buddha image, PhraBuddhasihing which is the important Buddha image that the people like to pour water on it in Songkran festival. Inside the chapel, the mural paintings depict scenes from the life of the Buddha.
3. The Red House - This teak house was originally one of the private living quarters of Princess Sri Sudarak, the elder sister of King Rama I. It was moved from the old palace in Thonburi to the Grand Palace for Queen Sri Suriyen, wife of King Rama II.