More than 10 children and their parents stepped back into one of the darkest chapters of Gibraltar's history as they explored the recently renovated World War Two Tunnels during a guided visit led by the Gibraltar National Museum. Leading the tour, Gibraltar National Museum guide Phil Smith explained how the tunnel network expanded rapidly during the war. "The very first tunnel was built in Gibraltar during the Great Siege back in the 1780s, and the last tunnels in Gibraltar were built in the 1960s just to improve road traffic." "But most of those tunnels, 30 kilometres of them, were built during the Second World War." The recreated secret chamber and weapons room proved particularly popular with the younger visitors, helping to bring to life the challenges faced on the Rock during the Second World War.