Bang Pa-In Royal Palace was used as a summer dwelling by the Siamese royalty and their consorts.
It is about 60 km north of Bangkok and within easy reach of Ayutthaya. Also called Bang Pa-In Summer Palace, the complex comprises several iconic buildings all around a large park. Renting an electric cart is a good way to go around, especially on hot days.
Coming all the way from Bangkok just for the palace might not be worth the trip, but it is a great stop on the way to Ayutthaya. Proper attire is required similar to visiting the Grand Palace, meaning no short skirts, sleeveless shirts, and shorts.
Open: Daily from 8.30 am to 5 pm