Located east of Ninh Binh province, covering almost 2000 hectares, Trang An eco-tourism complex is divided into 5 sections: a specially preserved area – Hoa Lu ancient citadel, a central area, a natural area of grottoes and caves, a tourist service area, and a holy mountain of Bai Dinh area. The total 47 historical vestiges, hidden caves and grottoes in limestone karst, valleys, rivers and streams all together create a fanciful landscape. With hundreds of big and small statutes, numerous categories of architectural works, Bai Dinh – Trang An combined complex is one of the biggest in Vietnam and has become a must–see place for almost travelers these days.
Dubbed "Ha Long Bay on land", the site covers an area of 10,000ha, including the three areas of the Trang An Ecological Site, Tam Coc-Bich Dong Site and Former Hoa Lu Former Capital Area. The region is scattered with karst topography such as limestone mountains, caves and lakes. The site is home to diverse fauna and flora with 500 kinds of flora, 73 kinds of birds, 41 kinds of other animals. Scientists found traces of early people dating back 5,000-30,000 years ago in the nearby Boi and Trong caves