Guest correspondent and renowned English horticulturist Adrian Bloom journeys to the heart of South Africa's famous wine-growing valley, Stellenbosch, to visit the Vergelegen Estate. Framed by the majestic Hottentot Mountains, this famous estate features long garden vistas that include 50-foot perennial borders, 300-year old camphor trees from Japan and a breathtaking white garden. Then, Bloom visits Kirstenbosch, one of the world's great botanical gardens. Situated on the slopes of Cape Town's Table Mountain, the garden contains a unique collection of native southern Africa plants, as well as miles of trails that showcase a variety of ecosystems.