The Tourist Authority of Thailand (TAT) has offices in Ayutthaya, Lopburi, Phitsanulok, and Sukhothai.
TAT (Ayutthaya) (Si Sanphet Rd., Ayutthaya. 035/246076. Daily 8:30-4:30).
TAT (Lopburi) (Rajawatprathat Rd., Tambol Tahin, Amphoe Meuang, Lopburi. 036/422768. Daily 8:30-4:30).
TAT (Phitsanulok) (209/7-8 Boromtrailokanat Rd., Phitsanulok. 055/231063. Daily 8:30-4:30).
TAT (Sukhothai) (City Hall, Tambol Thani, Amphoe Meuang, Sukhothai. 55/611-196. Daily 8:30-4:30).