The capital northeast of Vientiane is Hanoi, a city in northern Vietnam. It is the second largest city in the country and the capital of Vietnam. Hanoi is known for its rich culture and history, as well as its vibrant nightlife. It is home to many historical sites, including the Temple of Literature, the Imperial Citadel of Thang Long, and the Ho Chi Minh Mausoleum. The city also has a number of museums, galleries, and parks.