Serena Williams plays during the ladies singles semifinal match against Elena Vesnina of Russia at Wimbledon on July 7 in London. (Shaun Botterill/Getty Images)

Hey isn’t that . . . Twenty-two time grand slam tennis champion Serena Williams strolling through the National Museum of African American History and Culture on Sunday?

Williams posted an Instagram story (a minute-long mash-up of video and photos) of her time at the newly opened Smithsonian site on Sunday. From the social media evidence, the 35-year-old athlete was part of a private tour given by none other than Lonnie Bunch, the museum’s founding director. In one video, Bunch is describing the white lace shawl given to abolitionist Harriet Tubman by Queen Victoria of Britain in the late 19th century.

From the looks of it, the group toured all four floors of the museum, from the 19th century slave cabin located in the underground gallery to the exhibits honoring boxer Muhammad Ali and tennis player Arthur Ashe on the upper levels.