Củ Chi tunnels, War tunnels in Vietnam.
The Cu Chi Tunnels are an extensive network of underground passages, used by the Viet Cong during the Vietnam War.
Constructed in the late 1940s during the war against the French colonialists, the tunnels were expanded during the 1960s.
Today, they serve as a powerful reminder of the Vietnamese resistance and ingenuity during the war.
Visitors can explore parts of the tunnel system, which has been preserved and opened to the public.
Some sections have been enlarged to accommodate tourists, but remain a claustrophobic experience.
Location: Ho Chi Minh City
Sources: Wikimedia, OpenStreetMap