Kẽm Trống Bay is located in Thanh Hải village, Thanh Liêm District, Hà Nam Province of Vietnam.
Kẽm Trống includes a stream, mountains, fields and trees.
On the banks of the river, mountains and regularly here and there, and ledges come up to the water edge.
Hồ Xuân Hương, a poet in the 18th century, who was so famous that Vietnamese people awarded her the title of "Princess of poetry", wrote a poem on the sight of Kẽm Trống when visiting it, as follows: "On the two sides are mountains, The nice stream is between, This is Kẽm Trống, is it right?
The wind shakes tree branches with crackles, And makes waves sounding merrily..." There are many myths on the visits of Kings, Lords, Princes, and other visitors to Kẽm Trống, the natural landscape rewarded to the region of Mt Đọi and Châu River (the other way naming the land of Hà Nam).