When you want to take your time, bring your favorite book and go to the Chinese temple at the end of a street off the Naresdamri Rd, at the back of Lookghai guest house. You'll enjoy 270 degree panoramic ocean view from there! It is a small place and there are some benches under the tree. It is nice!
South of Hua Hin on the way to Sam Roi Yot National Park. The Pranburi river has scenic natural beauty.
Wat Khao Krailas. It's worth the climb up the steep staircase to the temple for the great views of the bay and countryside. Don't forget your camera.