secret underground tunnel beneath the U.S. Capitol in Washington, D.C.

A sitting member of Congress has given the public a glimpse of a secret underground tunnel beneath the U.S. Capitol in Washington, D.C.

He claims that the Capitol contains numerous hidden passageways beyond just this one.

The U.S. Capitol is known to have an extensive network of underground tunnels used for various functions, including security and transportation.

Freemasons played a significant ceremonial and symbolic role in the construction of the U.S. Capitol.