The Abyssinian Meeting House in Portland, Maine was built in 1828 and was a stop on the Underground Railroad. Today it's threatened by a lack of funding.
Built in 1919, the Rancho Cucamonga Chinatown House, in Rancho Cucamonga, Calif., was a general store and housing site for Chinese American laborers who helped build Rancho Cucamonga.
The Kake Cannery, in the remote Alaskan village of Kake, was a key player in the salmon-canning business during the first half of the 20th century. Loss of the canning industry and its deterioration over time threaten the site.
The Mountain View Black Officer's Club, in Fort Huachuca, Ariz., was built in 1942 as a club specifically for African-American officers. It faces possible demolition by the U.S. Army.
Ohio's Village of Mariemont, built between 1921 and 1925, is a national historic landmark that's considered a key example of town planning in America. Today it's southern border is threatened by a state highway proposal.
JFK Airport's Worldport terminal opened in 1960. This well known symbol of America's entry into the jet airliner era faces demolition at the hands of the New York/New Jersey Port Authority.
Along the banks of the James River in Virginia, America's first permanent English settlement, Jamestown, was founded in 1607. A prospective power line project threatens to mar the scenery of the historic areas along the river.
Montana's one-room schoolhouses, of which the state has many, have fallen victim to population migration away from rural areas. Enrollment in the schools has decreased, prompting the closure of many of these former centers of rural life in Montana.
The iconic Houston Astrodome opened its turnstiles in 1965 and was at the time called the "Eight Wonder of the World," as the world's first domed, air-conditioned stadium. No longer a home to major sports, the great stadium may well go the way of demolition.
Deterioration and resultant structural damage threaten the historic San Jose church, in San Juan, Puerto Rico. Built in 1532, it's one of the few remaining examples of 16th-century Spanish Gothic architecture.
Gay Head Lighthouse, in Aquinnah, Ma., was Martha's Vineyard's first lighthouse. Because of erosion, it is at risk of going over the edge of the Gay Head Cliffs.