Phu Tho Mountain is also known as Thach Son or Da Den Mountain and Co Luy she is a famous landmark from ancient times, 10km east of Quang Ngai City, created by nature and humans. Phu Tho Mountain is 60m high, about 8ha wide, on the mountain is a complex of temples and Champa citadel. The mountain has many gray granite stones with strange shapes like Hon Chuong, Hon Trong, Hang Pagoda, Xeo Quot Cave ... mixed with vegetation and green trees.

On the mountain there are also vestiges of Hang Pagoda (Thach Son tu) with the legend of tiger god, with Ban Co citadel, Hon Yang citadel is the old citadel of Cham people. At the foot of Phu Tho mountain, Co Luy village lies solitary with the sky, the water is dotted with poetic coconut groves and bobbing boats along the doorsteps to create a poetic and lively landscape.