Amid its buzzing cities, world-class shopping centres, and towns that mimic Europe, the extensive Luray cave system is, quite literally, a wonder hidden deep in the bowels of Virginia. The largest cave system in the eastern part of the country takes one through three acres of narrow trails flanked by stalactites and stalagmites, past mammoth stone formations with delightful names, into cathedral-sized rooms, past the enchanting Dream Lake, and the world's largest musical instrument, the Great Stalacpipe Organ that makes stalactites sing by gently tapping them. The cave system is part of the Shenandoah Valley, which also consists of the Shenandoah National Park, perfect for nature and wildlife lovers who can choose to hike its many trails or drive through the stunning forest.