Fun Things to do in Charleston! 
Downtown: 
Walk down "Rainbow Row" on East Bay Street towards Battery Park - awesome views of Charleston Harbor! You may see this area in the Horse & Carriage Tour (they have multiple routes and you won't know which route you are going on until they start the tour).
Marion Square - every Sat 8-2:00 they have craft and food vendors/sometimes live music 
Old City Market - shop from local merchants/homemade crafts - this is on Market Street. Takes about 30 minutes to walk through the market -an open-air market for most of the walk. 
Ghost Tour: https://ghostcitytours.com/ghost-tours/charleston-ghost-tours/
Culinary Tour - https://charlestonculinarytours.com/ 
Shops on King Street - 2nd Sundays they close the streets/no cars, live performers https://bit.ly/3IzKPXC
Rent bikes and ride around the Battery - https://charlestonbikeshare.com/ 
Take a ferry ride from downtown over to Fort Sumter where the Civil War began. ...