Union Base-Ball Grounds was a baseball park located in Chicago. The park was "very visibly downtown", its small block bounded on the west by Michigan Avenue, on the north by Randolph Street, and on the east by railroad tracks and the lake shore, which was then much closer than it is today. The site is now part of Millennium Park.

Millennium Park is a public park located in the Loop community area of Chicago, operated by the Chicago Department of Cultural Affairs. The park, opened in 2004 and intended to celebrate the third millennium, is a prominent civic center near the city's Lake Michigan shoreline that covers a 24.5-acre (9.9 ha) section of northwestern Grant Park. Featuring a variety of public art, outdoor spaces and venues, the park is bounded by Michigan Avenue, Randolph Street, Columbus Drive and East Monroe Drive. In 2017, Millennium Park was the top tourist destination in Chicago and in the Midwest, and placed among the top ten in the United States with 25 million annual visitors.