Hoa Lu: the remains are the temples dedicated to
King Dinh and King Le, the two heroes who lived in 10th century and
chose Hoa Lu to build the citadel of the capital city ( from 968 to
1009)
Trang An:Trang An grottoes whichis a gathering of
31 valleys, 50 cross-water caves, and home to 600 kinds of flora and
over 200 kinds of fauna, many of them in the Red Book of Vietnam.