Tunnels of the U.S. Capitol

http://www.atlasobscura.com/places/capitol-building-tunnel-system?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=840c0da143-Newsletter_3_20_2017&utm_medium=email&utm_term=0_f36db9c480-840c0da143-64536349&ct=t(Newsletter_3_20_2017)&mc_cid=840c0da143&mc_eid=9337bd4ceb

A bit of DC trivia.