Great Siege Tunnel Gunners Reconstruction Gibraltar Editorial Image

Great Siege Tunnel gunners reconstruction, Gibraltar, Europe. The Great Siege Tunnels, also Windsor galleries, in the British Overseas Territory of Gibraltar, also known as the Upper Galleries, are a series of tunnels inside the northern end of the Rock of Gibraltar. They were dug out from the solid limestone by the British during the Great Siege of Gibraltar of the late 18th century.