Hua Hin has some beautiful temples: Khao Tekiab, a mountain at the end of the beach with a temple on top. From the top you have a beautiful view of the beach and during the climb you will find lot of monkeys. The mountain is also called “monkey mountain” by locals.
Or visit the Wat Huay Mongkol Khao Takiab. This temple is home to a huge statue of the legendary Thai monk Luang Phor Thuad.