The historic ruins of Dolores Mission and Cemetery in Picketwire Canyon, Colorado, are threatened by the planned expansion of the U.S. Army's Pinon Canyon Maneuver Site.
Photo: Jim Lindberg

Government-mandated "fast-track" construction of high voltage power transmission lines, like this one in Loudoun County, Virginia, could do damage to historic sites in several mid-Atlantic states.
Photo: Bri West

Oak Hill, the former home of Supreme Court Justice John Marshall, could be affected by power line construction along nearby Interstate 66 in Virginia.
Photo: Katherine Dart

Farmstead buildings in the Mark Twain National Forest in southern Missouri have suffered years of neglect.
Photo: Jennifer Sandy, MWO Field Representative

The Facilities Master Plan for Mark Twain National Forest calls for many historic buildings to be decommissioned.
Photo: Jennifer Sandy, MWO Field Representative

At Stewart's Point Racheria in northern California, vandalism and lack of maintenance have left several tribal buildings — including the Old Round House, pictured here — in need of repair.
Credit: Bambi Kraus

The National Trust's "most endangered" list includes motels built along U.S. Route 66 between the late 1920s and the late 1950s.
Credit: Carol M. Highsmith

Route 66 motels in disrepair are often demolished as an expedient to new development.
Credit: Carol M. Highsmith