In the rainy reason, the rivers, streams in the southern valley of Tam Dao mountains and also Vuc Tuyen River, Ton river, Ba Ha River, Dong Cau River, Dong Chao River…all push the water into Dai Lai Lake. This makes the water level able to increase to 21 meters. Despite of being large, the lake surface doesn’t make the visitors feel spacious, they can discover many interesting scenery when boating across defiles which are still strangely wild.

In the north of Dai Lai Lake, visitors can see Tam Dao Mountains which are very high and further green vast forests. In three sides of the lake surface, after the continuous upturned-bowl hills, there is Than Lan Mountain which is followed next by stable dams forming the wall keeping water. About 9,000 hectares of protective forests are planted around the lake. From the swimming area in the lake, the visitors can go straight to the top of Than Lan Mountain in the south to keep their sight away towardHanoi capital which is sparkling under the afternoon sunshine.

People being interested in climbing can make a travel to the North, pass the forests and Nhe Mountain Pass to enter Thai Nguyen area or turn to Mo Qua Mountain to try climbing on the cliffs which are high until sky. From the height, people can blearily see Xa Huong Lake, Lang Ham Lake, Gia Khau Lake… in the forest, behind the sign of ancient kingdom of General Nguyen Danh Phuong who had built his own separate country and fought against the empire of King Le – Emperor Trinh for ten years.  

Mo Qua Mountain in the north of Dai Lai

The blue color of the deep lake rounded by green of the forests and high mountains as well as cool winds blowing from three sides of the lake surface bring to visitors the peaceful, pleasant feelings which are rarely found.

Green pine forest in Dai Lai

Especially since early years, many flocks of mysterious birds have flied to and gathered many and many in the islands among the lake, this is a strong proof of the pure air in natural environment here. Every afternoon, the white storks blearily fly shading on the lake surface, the birds sing beautifully and the pine forests whizz, that natural show will be very attractive call for the guests to come here.