ゴッタルド鉄道トンネル
Saint Gotthard Tunnel South Portal monitored the original south entrance to the Gotthard Rail Tunnel. Portions of the original installation remain, but the tunnel entrance has been extended to the south and the historic portal no longer exists. These positions were built in 1886-87 and represent the first modern fortifications in Switzerland. A gallery (a long horizontal tunnel) links the main tunnel positions back to Fort Airolo.