1. Lake of the Restored Sword, also known as Hoan Kiem Lake, is a popular attraction in Hanoi, Vietnam. It is located in the historical center of the city and is known for its tranquil atmosphere and natural beauty. The lake is surrounded by temples, pagodas, and scenic walking paths. One of the most interesting facts about the lake is that it is home to a rare species of turtle called the Hoan Kiem Turtle, which is considered sacred in Vietnamese culture.

2. The lake is open to the public 24/7 and there is no entrance fee. However, some of the temples and pagodas around the lake may have their own working hours and admission fees. There is no phone number available for the lake.

3. The lake is located within walking distance from many of Hanoi’s major tourist destinations and can be easily reached by foot or by bicycle. Taxis and motorbike taxis are also available for hire in the area.