Ui valley is located in Gia Sinh commune, Gia Vien district, Ninh Binh province. Located in the core area of Trang An World Heritage Complex, Ui valley has the wild, quiet beauty of Hoa Lu special-use mountains and forests.

From the three-entrance gate of Bai Dinh Pagoda, about 3km into Thung Ui tourist area, to Trang An Kinh Thien Temple, which is also the opening door to Ui valley tourist area. Kinh Thien Altar is located at the highest position in Moc Hoan valley, a cultural architectural work restored in the Trang An World Heritage Complex to preserve and promote the historical value of the Chinese capital. Ancient jar. Trang An Kinh Thien Altar is the place to worship the Jade Emperor and 4 other gods in heaven: Nam Tao, Bac Dau, Brahma, De Thich and is where in the past the Emperors based in Hoa Lu held sacrificial rituals. Report to heaven and earth, pray for peace and peace for the country and people. The annual Trang An Thirteen Altar Ceremony is an important event in the series of activities associated with the Hoa Lu Festival to commemorate the great contributions of King Dinh Tien Hoang and the founding fathers in the course of national history. Vietnam. Thung Ui tourist area is a place to preserve and promote the value of the ancient Hoa Lu palace by recreating the life of ancient Vietnamese people in the 10th century. This is a new tourist destination that has been put into operation for tourism services since 2018 with a system of stilt houses, old houses, orchards, flower gardens,... This place is suitable for relaxing in natural scenery and organizing activities such as teambuilding, campfire,... In early 2023 , The Management Board of Bai Dinh Pagoda Spiritual Culture Area deployed a tram route to serve tourists visiting Bai Dinh Pagoda and experiencing Thung Ui tourist area.

Thung Ui is also the place leading to many relics in the core area of Trang An World Heritage complex such as Trong cave, Moi cave, Boi cave and Tran temple.