The tunnels were excavated through solid rock using jackhammers and explosives, a process that cost many laborers their lives.
Many of the tunnels were never fully completed before the liberation of Jersey in 1945.
The site was originally codenamed 'Hohlgangsanlage 8' (Ho 8) by German engineers.
Following the war, the tunnels remained sealed for decades before being partially converted into a tourist attraction in the late 20th century.
The complex remains at a near-constant temperature of approximately 12-14 degrees Celsius regardless of outside weather.
Jersey War Tunnels, also known as Höhlengruppe 8, is an extensive underground complex excavated by German forces during the World War II occupation of Jersey. The site consists of over 1,000 meters of tunnels originally intended as an ammunition store and barracks for the occupying garrison. Construction relied on forced and slave labor from across Europe, including prisoners of war. Today, the tunnels house a museum detailing the history of the occupation, the experiences of islanders, and the liberation of the Channel Islands. The site maintains a constant temperature year-round due to being located deep within the hillside. Exhibits feature original wartime equipment, propaganda materials, and interactive displays. The site is a registered heritage location that serves as a memorial to those who labored under inhumane conditions. It remains the largest remaining structural evidence of the German fortification of the island.
The entrance tunnel sequence provides the most dramatic perspective of the scale and depth of the fortification.
Bring a warm sweater or jacket, as the underground tunnels are consistently cool even during summer months.
Wear comfortable, flat walking shoes with good grip, as the tunnel floors can be uneven.
Allow enough time to read the extensive historical placards, which provide the bulk of the site's context.
Do not attempt to walk in the areas marked as closed or restricted, as these parts of the tunnel system are structurally unstable.
Operates seasonally; typically closed during the winter months from November through February.
Maintain a quiet, respectful volume throughout the tunnels; refrain from touching historical artifacts.
