The first phase of a new 12-acre park, stretching from Grand Avenue at the Music Center to Spring Street at City Hall, is opening this weekend. The L.A. Grand Park is a joint City and County venture and will feature lawns for performances and events, as well as a newly restored Arthur J. Will Memorial fountain. On Saturday, July 28th, and Sunday, July 29th, there will be opening festivities. The events on Saturday coincide with National Dance Day, the ones on Sunday will be musical.