Mysterious Metal Doors in Washington DC Guess what this is Strange things USA November 21, 2010November 18, 2010 by StreetViewFun.com StreetViewFun.com · 1 comment Mysterious Metal Doors set into the ground next to the northbound lanes of Rock Creek Parkway. Secret escape route from White House? Mobile missile garage? View Larger Map The answer? It’s a water supply vault. Read more here GD Star Ratingloading... Related Street View images Crashed car 10 feet dragon found in Indonesia Pass through the metal grill What’s in his hand?