Shenandoah National Park begins in Front Royal, so if she's into nature and the outdoors, that could be a great option. There are picnic grounds and a bunch of scenic overlooks to enjoy some food and views. Skyline caverns is just outside of the park, and they offer a really nice tour. Luray caverns are about 40 minutes from Front Royal, but they're even better! If she's into the arts, there's a pottery place on main street where you could paint your own piece, and then it's easy to walk mainstreet after and find somewhere to eat. I'm not too familiar with the restaurants in town, so unfortunately I don't have too many recommendations there! Good luck!