Phetchaburi is dotted with an unusually large number of old temples, and Wat Ko Kaew Sutharam is the most impressive.
The 18th century murals found here are among the best conceived in Thailand. They are incredibly well preserved and full of great details and colours, a truly fantastic sight. There is also an lovely Buddha statue.
Not many people come to Phetchaburi, despite the amazing temples, caves, and the royal palace located on top of a hill which affords splendid views of the coast.
For a taste of traditional Thailand, this is the place to go, and it's only a 2 and half hour journey from Bangkok!