There are a number of things that you can do when you visit Ayutthaya.
1) Rent a bicycle from nearby the Ayutthaya Railway station and take a leisurely ride.
2) Visit the Tapestry Restaurant and indulge in some traditional dim sum. (The traditional Chinese soup kra por pla made with fried fish maw is highly recommended.
3) Visit Wat Mahahat. This is the temple best known for the head of the Buddha lodged in the roots of a tree close to the temple. There are a great many more temples to visit here, this is only one.
4) Close to the ancient ruins there is Classic Kameo Court which is an ideal place to stay. It offers fully-equipped deluxe studios and one-bedroomed suites ideal for short and long stays.
The text is from the latest edition of Cape + Kantary magazine and the full article can be found in - http://www.kasemkij.com/ckmagazine/index.html.