Here are some of the best natural attractions in and around the Hua Hin area. None are more than 1 hours drive from Hua Hin town center. Kaeng Krachan national park being the furthest attraction away, but the drive itself is nice and is well worth the journey.
1
Khao Sam Roi Yot National Park 
A marine national park opened in 1966 and was the first coastal national park in Thailand. Beautiful beaches, mangrove forest, and lots of peaks. Wildlife galore and if your feeling fit the Phraya Nakhon cave and Royal pavilion is a must see. Just 63 kilometres south of Hua Hin, less than a hours drive. There are camp sites and bungalows in the park. More Info & Pics Here
2
Kaeng Krachan National Park 
Thailand's largest national park (2,914 sq km). Most of Kaeng Krachan lies in the Phetchaburi province along the border with Myanmar. Lush vegetation and teeming with wildlife. Just 1 hours drive from Hua Hin town it shouldn't be missed. There are 2 camp sites and bungalows available for rent.
More Info & Pics Here
3
Pranburi Forest Park 
The Pranburi Forest Park protects the mangrove forest of the Khlong Kao-Khlong Kob National Reserve Forest. It is located at the mouth of the Pranburi River to the Gulf of Thailand in Pranburi district, Prachuap Khiri Khan. The park covers an area of 3.17 km² and was declared a forest park by the royal forest development in 1982.
More Info & Pics Here
4
Pala U Waterfall 
The Pala U Waterfall is waaay west of Hua Hin nearing the border with Myanmar. It is in fact the most southern part of the Kaeng Krachan National Park but it is easy to get to from Hua Hin town, just about a 40 minute drive. It is a lovely natural & peaceful place. The waterfall is made up of 16 tiers. The first five tiers of Pala U waterfall are pretty easily accessible but after these the going becomes quite steep and difficult.
More Info & Pics Here
