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

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

According to Vietnamnet.vn