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The Salpa Trail is a 50-km one-way hiking route between Virolahti and Miehikkälä. It follows a part of the Finnish World War II defence line (the Salpa line). Along the route there are numerous remains of bunkers, dug-outs and other fortifications and several rest-stops. They are equipped with a compost toilet, compost, a fireplace and a firewood shelter and some of them with a lean-to for an over-night stay. The Bunker museum in Virolahti and the Salpa Line museum in Miehikkälä are part of the route.