The mystery of the underground train line under the US Capitol

The subway line below the US Capitol building is one of the shortest and most unique in the world.

According to the Washington Post, this special subway line is not open to the public, but only serves those who are congressmen or staff of the US Capitol building.

The subway network below Capitol Hill consists of three lines, two on the Senate side, north of Capitol Hill, and one on the House side south.

The purpose of this bus route is to help congressmen and staff travel safely from their workplaces to their respective chambers in the National Assembly./.

According to Vietnamnet.vn