WATCH: Congressman stunned after lifting floorboards, finding secret staircase going beneath the Capitol

Under the floorboards of the U.S. Capitol lie hidden staircases and passageways left over from the iconic building’s original construction in the 18th century, a viral video posted by Republican North Carolina Rep. Tim Moore shows.

“Construction started in the 1700s and there are all sorts of little hidden passageways. As you saw, I just pulled this cover up, and you can see,” Moore said in a video posted to his official congressional X account on Friday, showing a secret door in the floor of the Capitol.

Come with me to see one of the hidden secrets of the Capitol!

The Lincoln Room is one of my favorite spots to bring visitors — when President Lincoln was serving in the House, he sat by the fireplace in this room to read his letters, but the most interesting part of the room is… pic.twitter.com/hp36jfQrk4

— Congressman Tim Moore (@RepTimMooreNC) May 9, 2025

The U.S. Capitol’s construction was commissioned in 1793, with President George Washington laying the cornerstone that same year. The original building was completed in 1826, with various expansions made across the decades, such as a visitor center that opened in 2008.