(CNN) — The Grand Canyon, a "war room" of the civil rights movement, the Factory gay disco and Miami's Little Havana have all been named "endangered" by the National Trust for Historic Preservation.
"This year's list is our most diverse ever, and reflects our commitment to recognizing and preserving all the facets of our diverse history," said Stephanie Meeks, president and CEO of the nonprofit trust.
"From the LGBTQ history of the Factory in California to the Cuban-American heritage of Miami's Little Havana to the civil rights legacy of the A.G. Gaston Motel in Birmingham, these sites tell American stories that have been overlooked for too long."
More than 260 significant sites have been listed as endangered since the list was launched in 1988, and just 12 sites have been lost through 2014, Meeks said. "The list is a great tool for shining a spotlight on places of significant architecture or historical importance."
Though nominations can come from anyone, Meeks said it helps if nominees have local organizations able to use the national spotlight to explain the value of their sites. Trust employees pick the final list, looking for national significance, the urgency of the threat and the likelihood of success in preserving the site.
Here are the 11 most endangered places for 2015 (in alphabetical order):
1. A.G. Gaston Motel, Birmingham, Alabama
2. Carrollton Courthouse, New Orleans
3. Chautauqua Amphitheater, Chautauqua, New York
4. East Point Historic Civic Block, East Point, Georgia
5. Fort Worth Stockyards, Fort Worth, Texas
6. The Grand Canyon, Arizona
7. Little Havana, Miami
8. Oak Flat, Superior, Arizona
9. Old U.S. Mint, San Francisco
10. South Street Seaport, New York
11. The Factory, West Hollywood, California