Vana Nava Water Jungle is the headline attraction — a rainforest-themed water park with 19 slides and a kids' zone. Entry runs around ฿1,000-฿1,200 ($30); the attached Vana Nava Sky observation deck adds a sunset view over the coast.
Cicada Market (Friday–Sunday evenings) is the town at its best: handmade crafts, live bands and a huge open-air food court. The nearby Tamarind Market adds more street food on the same nights.
Hua Hin Beach stretches for kilometres of shallow sand. Mornings are for swimming and pony rides; it is not a snorkeling beach, so keep expectations right.
Santorini Park in nearby Cha-Am recreates a blue-and-white Greek village with rides and photo spots — very popular with families and Instagrammers. Close by, Camel Republic and the Swiss Sheep Farm are simple animal-and-photo parks that young kids enjoy.
For something quieter, tour the Hua Hin Hills (Monsoon Valley) vineyard for a Thai wine tasting. Or climb Khao Takiab ("Chopstick Hill") at the beach's south end for the temple, the giant Buddha and views back over the bay — just watch out for the aggressive monkeys near the temple.