The Sang mountain range is located between Nghia Linh ancestral mountain, Tam Dao mother mountain and Ba Vi father mountain. Currently, the Sng mountain range belongs to Song Lo and Lap Thach districts, about 30km northwest of Vinh Yen province.

The Sang mountain peak is 640m high above sea level and joins with dozens of other large and small mountains into a long range called Sang mountain range. This is a gift of nature given to the countryside of Song Lo, it is like a green pearl adorning the Lo river - a gentle silver silk flowing at the foot of Sang mountain.

Sang Mountain has an abundant water source flowing all year round creating many rapids, beautiful lakes and providing irrigation and fishery resources. The large streams are the habitat of many aquatic species (gobies, catfish, perch, trach locust, shrimp, shrimp, crab, ...).

Going deep into the mountain is a collection of many waterfalls. In which, there is a waterfall that is considered the highest and most beautiful, the water from the waterfall pours down from above, blowing bubbles into tiny dust that spreads like smoke. Therefore, it was given the simple name "Bay waterfall" by the people in the area. This is a waterfall created by a stream flowing down from the top of Sang Mountain. The long-term flow from the endless mountain land has created many rapids.

Sang Mountain - Bay Waterfall, a gift of nature, is still intact, like "sleeping" in the lullaby of the waterfall. The sound of water rings day and night as an invitation for visitors to visit. Surely one day not far, the whole scenic complex around Sang mountain such as: Waterfall Bay, Bo Lac lake, Truc Lam Tue Duc Zen Monastery, De Tham cave, ... will become attractive destinations not to be missed when to Vinh Phuc.