The Underground Cu Chi Tunnels

The Cu Chi Tunnels are a vast collection of underground passageways situated in Cu Chi, Ho Chi Minh City in Vietnam. These tunnels are connected to a much larger group of subterranean channels that lie beneath the country. During the Vietnam war from 1955-1975, the Cu Chi Tunnels hosted a fair amount of battles, and were base of operations for the Viet Cong in 1968.

Source: http://www.articlesbase.com/travel-tips-articles/the-underground-cu-chi-tunnels-5352904.html

scenery photograph field canyon