The ruins of Siam's former capital, a UNESCO World Heritage Site, with Wat Mahathat's Buddha head in tree roots, Wat Phra Si Sanphet and Wat Chaiwatthanaram. Most people go on a guided day tour, or by train and then bicycle between the temples.
Muay Thai camps around Bangkok
Other stops in Bangkok
Ayutthaya, Phra Nakhon Si Ayutthaya, Bangkok