The National Trust for Historic Preservation‘s annual list of the country’s most endangered historic places typically highlights landmarks threatened by demolition or other harm. But today (May 10), in celebration of the list’s 30th anniversary, the trust instead showcases 11 once-vulnerable locations that preservationists successfully protected from erasure.

The sites featured on the latest list include four places connected to communities of color and racial justice history: 

• The Penn School in South Carolina, the first school in the South designed to educate formerly enslaved Black students, now part of the Reconstruction Era National Monument
   
• Little Rock Central High School in Little Rock, Arkansas, where nine Black students known as the "Little Rock Nine" challenged angry White mobs in 1957 to desegregate the school per the U.S. Supreme Court’s Brown v. Board of Education ruling
   
• Angel Island Immigration Station in San Francisco Bay, California, where hundreds of thousands of Asian immigrants first entered the country between 1910 and 1940  
   
• Nine Mile Canyon in Utah, home to stone artwork and other relics of the Ute people, once threatened by chemical damage from nearby car traffic