Turf Valley has many things right in the venue! Consider signing up for a round of golf, getting a reservation at Turf Valley's spa, or having a good meal at Alexandra's.
Ellicott City is just next door and has a variety of shops and restaurants to explore.
Further down the highway is Columbia and the Columbia Mall. A great area for food and shopping.
Baltimore is probably the closest, biggest city near Turf Valley. If you haven't been, The National Aquarium and surrounding Inner Harbor area can't be missed.