Las Raíces Tunnel

It is located about 700 kilometres (430 mi) south of Santiago de Chile on the paved Route 181-CH connecting the city of Temuco with the pass Pino Hachado towards Argentina.

As such, the tunnel serves as a link between the Pacific and Atlantic Oceans, from Lebu in Chile to Bahía Blanca in Argentina.

This tunnel allows only one-way traffic, which is regulated by a toll station where a fee of 400 pesos ($0.53 USD) per car is charged.

[1] Its average traffic is about 450 vehicles daily, including some heavy fuel trucks coming from Argentina.

Construction began in 1930 and lasted eight years, with an investment of more than 32 million Chilean pesos of that time.