Breathtaking sunset on Phia Oac-Phia Den mountain.(Photo: VNA)
The beauty of untouched Phia Oac-Phia Den tourism site in Nguyen Binh district. (Photo: VNA) 
The road snaking its way around the Phia Oac mountain will bring enthralling experience to adrenaline seekers. (Photo: VNA)
Old French-styled villas are still preserved in Phia Oac-Phia Den tourism site (Photo: VNA) 
Kolia resort will be an ideal retreat for tourists to Phia Oac-Phia Den tourism site. (Photo: VNA) 
Thang Hen lake is a fresh water lake on the mountain.(Photo: VNA)
"Mat than" mountain is located in Ban Danh valley, Quoc Toan commune (Tra Linh district). (Photo: VNA) 
Valley is coulourised yellow in ripe rice season. (Photo: VNA) VNA
