Coming to Yen Bai, the first place visitors cannot ignore is Thac Ba Lake - a national historical relic. With a length of more than 80km, with more than 1300 large and small islands including many caves and charming landscapes.
The unique feature of Thac Ba Lake is its calm, peaceful lake, interspersed with thousands of large and small hills, limestone mountains floating on the waves, creating a perfect ink painting…