Khao Yai is Thailand's oldest and one of its largest national parks, a UNESCO World Heritage Site. Dense jungle just 200 km from Bangkok is home to wild elephants, gibbons, hornbills, and many other animals.

Main attractions: Haew Narok and Haew Suwat waterfalls (from "The Beach" film), viewpoints overlooking the jungle, night safaris for wildlife watching. The park is ideal for hiking and birdwatching.

Best time to visit is the dry season (November-February). You can stay at campsites or nearby hotels. Hiring a guide is recommended for deep jungle treks.