What the Helen of Troy is This

What the Helen of Troy is Going on Here?!?!

“Dear PoPville,

I was driving northbound on 395 and waiting in line to make the right turn onto New York Ave NW. I saw a garage door open at the mouth of the tunnel, directly under k street NW. Inside there seemed to be multiple giant lion statues,

office furniture and a port-a-john.

Does anyone know what these lion statues are or where they came from?