Dong Phayayen Forest Park is a protected area located in northeastern Thailand. It covers approximately 1,200 square kilometers and is part of the larger Dong Phayayen-Khao Yai Forest Complex. The park is known for its rich biodiversity, including various species of flora and fauna, some of which are endangered. The park features lush forests, waterfalls, and diverse ecosystems, making it a popular destination for nature lovers and hikers. It is home to wildlife such as Asian elephants, gibbons, and numerous bird species. Dong Phayayen Forest Park was designated a UNESCO World Heritage Site in 2005, highlighting its ecological significance.