Nha Trang is Vietnam’s most popular seaside resort town located along the second most beautiful bays in the country. It features beautiful beaches with fine and clean sand and clear ocean water with mild temperatures. The city has about 300,000 inhabitants and is more lively and urban in character than other beach destinations like Mui Ne and Phu Quoc. It’s also the scuba diving center of Vietnam. The Cu Chi Tunnels are an immense network of connecting underground tunnels located about 40 km northwest of Ho Chi Minh City (Saigon). The tunnels were used by Viet Cong guerrillas as hiding spots during the Vietnam War, and were the base of operations for the Tết Offensive in 1968. The tunnels have become a popular tourist attraction, and visitors are invited to crawl around in the safer parts of the tunnel system.