Hat Yai is one District in Songkhla province and also be town of business in Lower Souther of Thailand. Hat Yai isn't far from the border of Malaysia in SaDao district. Along way from Bangkok to Hat Yai have many of Tourist attractions.
This is the old province with a long time history. Phetchaburi has Historic site which worth the visit such as PripPlee Temple and Vachira Prasat Museum, Phra Nakhon Khiri Historical Park and go to visit the most beautiful palace at Mrigadayavan Palace.
Visit Wat Phra BorommathatChiya Worawihan in Chiya district. This is the only Buddhist place that complete with identity of Srivijaya art and contain relics of the Buddha.
If you don't hurry try to visit HuaHin or Pranburi with famous beach or go to see Khao Chongkrachok and worship relics of the Buddha and Buddha's footprint. Go to see the best view point at the palace Krom Luang Chumphon and The pagoda nine peaks.
Let go to visit Sai ree beach, the beach of the public's statue of Krom Luang Chumphon and battleship Royal Prarewg model and the battleship of Thai navy
Visit Samila beach and go to Khao Khohong for worship of Guanyin and The great Buddhist sacred. Walking around the centre city or go to Tonngachang waterfall.