Two temples in Ayutthaya. Ayutthaya Historical Park has 141 tickets and tours to book; Wat Nang Kui has no online ticket listed. The table and the two notes below put them side by side; the full pages have what to see, the ticket and the timing for each.
Ayutthaya is not a fenced park with a single gate. The ruins are scattered across an island formed by three rivers and the surrounding town, and the main temples each charge a small fee for foreigners at their own entrance. A combined ticket covering the six principal temples is sold at the larger sites and pays for itself if you visit four or more. Several important temples, including the active Wat Phra Mongkhon Bophit, are free.
Most visitors come for a day from Bangkok, about 80 km to the south, and the tours fall into a few kinds. Minibus day trips with a guide visit four or five key temples and include lunch, sometimes with a stop at the Bang Pa-In summer palace on the way.
No ticket for Wat Nang Kui alone is sold online, and it is not one of the headline sites covered by the combined ticket for the Ayutthaya Historical Park. It is a small, registered historic temple in the south-eastern part of the old island, visited mostly by local worshippers and by travellers exploring Ayutthaya at their own pace; where there is a donation box, a small gift is the appropriate gesture.
Getting there is the main decision. The usual approach for anyone staying in Ayutthaya is to rent a bicycle or scooter, or to hire a tuk-tuk by the hour, and to slot the temple into a loop that takes in the riverside sites at the southern end of the island.