Zionsville is one of those obnoxiously quaint mid-western towns. So if you have time to kill, take a stroll down Main Street and grab a bite at Rosie's or the Friendly Tavern. The antiquing and boutiquing along the way should fill some time!
Head to Milktooth for the BEST breakfast ever! (Even Bon Appetit voted one of the top 10 best new restaurants in 2015). It's worth the 25 minute trek to downtown Indy.
For quirky shopping, a quick bite, and solid Hoosier hipster vibes, check out Fountain Square - an achingly trendy neighborhood just outside downtown Indy.
Indiana is about as flat as it gets...but if you really want to get some fresh air and exercise before the wedding, you could hike up a hill at Eagle Creek Park!