Ho Chi Minh - Cu Chi Tunnels , War Museum and post office.

The tunnels of Củ Chi are an immense network of connecting underground tunnels located in the Củ Chi district of Ho Chi Minh City (Saigon), Vietnam, and are part of a much larger network of tunnels that underlie much of the country. The Củ Chi tunnels were the location of several military campaigns during the Vietnam War, and were the Viet Cong's base of operations for the Tết Offensive in 1968.
The tunnels were used by Viet Cong soldiers as hiding spots during combat, as well as serving as communication and supply routes, hospitals, food and weapon caches and living quarters for numerous North Vietnamese fighters. The tunnel systems were of great importance to the Viet Cong in their resistance to American forces, and helped to counter the growing American military effort.

he War Remnants Museum is a war museum at 28 Vo Van Tan, in District 3, Ho Chi Minh City (Saigon), Vietnam. It primarily contains exhibits relating to the American phase of the Vietnam War.

Saigon Central Post Office  is a post office in the downtown Ho Chi Minh City, near Saigon Notre-Dame Basilica, the city's cathedral. The building was constructed when Vietnam was part of French Indochina in the early 20th century. It has a neoclassical architectural style. It was designed and constructed by the famous architect Gustave Eiffel in harmony with the surrounding area. Today, the building is a tourist attraction.
Inside the Saigon Central Post office of special note are two painted maps that were created just after the post office was first built, the first one located on the left side of the building is a map of Southern Vietnam and Cambodia titled ‘Lignes telegraphiques du Sud Vietnam et Cambodge 1892′ which translates to ‘Telegraphic lines of Southern Vietnam and Cambodia 1892” The second map of greater Saigon is titled ‘Saigon et ses environs 1892′ translating to ‘Sai Gon and its environment 1892