WORLDS Amazing tunnels

Cheyenne Cave

America's main security department command center operates within the mine. The artificial cave was set up in 1947 to bring the command center from New York to the center of the country. In 1961, the task of the cave was started. In 1966, the missile warning center and command center began to function.

Qi Shi Cave Vietnam

Located in the Quyu Shi district of Vietnam, this cave has many cave passages. During the Vietnam War, the Vietnamese Communists were hiding in the caves and guerrilla attacks on US forces.

Eisenhower Cave Usa

Located in the west of Denver in the state of Colorado, the Eisenhower cave is 80 km long. It is made up of four lanes. It is the tallest cave trail in the world at sea level.

Mail train London

The uninterrupted electric trains were operated on the cave to facilitate faster letters and supplies for the post office headquarters of the East and West in East and West. These parcels of small compartments ran from 1927 to 2003. The cave was 10.5 km long and had 8 train stops.

Yerba mining San Francisco

The route is set in San Francisco Bay, connecting the Oakland region of San Francisco and San Francisco, California. On this route, the tunnel is set on the island of Yerba Buena.