庫布斯古勒湖（Lake Khovsgol）有個別稱“東方的藍色珍珠”是蒙古國最大的湖泊，也是世界第二深淡水湖。這里的空氣新鮮，景色優美，被喻為東方的瑞士。水域總面積 2760平方公里。湖水深262.4米，起水量占全世界淡水的2%。這里除了湖中碧藍的湖水，還有周圍的茂密原始森林及森林中的馬鹿、梅花鹿、黑熊等野生動物及漫山遍野的野花香草等豐富的植被，這里還居住著世界上人口很少的以養訓鹿為生的少數民族——查堂。

Known as The Dark Blue Pearl, Lake Khovsgol is Mongolia's largest and deepest lake. Located in the northernmost province, it is the largest tributary stream of Lake Baikal in Russia. It's the second largest fresh water lake in Central Asia. It's inhabited by nine species of fish including the Siberian grayling and lenok. Fishing and sport fishing are becoming popular in the lake area. Taiga Fauna and Flora,Tsatan, practicing raindeer breeding are the main attractions for tourist. A ferryboat operates between Khatgal and Khanh, two towns on the southern and northen shores of the lake that is within the boundaries of the Khovsgol National Park. Different ethnic groups live in the area: Khalh, Darhadt, Butyat. Tsaatans are raindeer herders. Lake Khovsgol is on the important migration route for birds from Siberia, thus facilitating marvelous opportunities for birdwatching.