A family pushes a snack cart past a slab of the Berlin Wall, displayed near the border wall that separates the United States from Mexico, in Tijuana, Mexico, on Aug. 25. The Associated Press

TIJUANA, Mexico — As the U.S. government built its latest stretch of border wall, Mexico made a statement of its own by laying remains of the Berlin Wall a few steps away.

The 3-ton pockmarked, gray concrete slab sits between a bullring, a lighthouse and the border wall, which extends into the Pacific Ocean.

“May this be a lesson to build a society that knocks down walls and builds bridges,” reads the inscription below the towering Cold War relic, attributed to Tijuana Mayor Montserrat Caballero and titled, “A World Without Walls.”

For Caballero, like many of Tijuana’s 2 million residents, the U.S. wall is personal and political, a part of the city’s fabric and a fact of life. She considers herself a migrant, having moved from the southern Mexico city of Oaxaca when she was 2 with her mother, who fled “the vicious cycle of poverty, physical abuse and illiteracy.”

The installation opened Aug. 13 at a ceremony with Caballero and Marcelo Ebrard, Mexico’s former foreign secretary who is now a leading presidential candidate.

Caballero, 41, is married to an Iranian man who became a U.S. citizen and lives in the United States. She and their 9-year-old son used to cross the border between Tijuana and San Diego.

Shards of the Berlin Wall scattered worldwide after it crumbled in 1989, with collectors putting them in hotels, schools, transit stations and parks. Marcos Cline, who makes commercials and other digital productions in Los Angeles, needed a home for his artifact and found an ally in Tijuana’s mayor.

“Why in Tijuana?” Caballero said. “How many families have shed blood, labor and their lives to get past the wall? The social and political conflict is different than the Berlin Wall, but it’s a wall at the end of the day. And a wall is always a sphinx that divides and bloodies nations.”

President Joe Biden issued an executive order his first day in office to halt wall construction, ending a signature effort by his predecessor, Donald Trump. But his administration has moved ahead with small, already-contracted projects, including replacing a two-layered wall in San Diego standing 18 feet high with one rising 30 feet and stretching 0.6 miles to the ocean.

The wall slices through Friendship Park, a cross-border site inaugurated by then-U.S. first lady Pat Nixon in 1971 to symbolize binational ties. For decades, families separated by immigration status met through barbed wire and, later, a chain-link fence. It is a cherished, festive destination for tourists and residents in Mexico.