Griffin’s gift to the Underline comes as the billionaire has talked publicly about moving Citadel out of Chicago because of his concerns over rising crime. Griffin is in the process of building a mansion in Palm Beach on $350 million oceanfront land. Besides Chicago and Florida, Griffin also has properties in New York and London.

Other plans for the Underline include crosswalk improvements, planting 100,000 native plants and trees and building a playground and a Metrorail station plaza. Construction of the park is also supported with funds from Miami Dade County, the state of Florida and the city of Miami.

“The Underline brings together the best of Miami, with spaces for families and visitors to enjoy the outdoors and engage with the arts year-round,” Griffin said in a statement. “This revitalizing project is an example of the opportunities that public-private partnerships can unlock to enrich our communities.”

Last year, Griffin gave $7.5 million to Chicago Connected, a public-private investment to provided free high-speed internet service to about 100,000 Chicago Public Schools students. The program inspired a similar program in Miami, which launched this year with funding from Griffin.

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