The vegetable garden of the Château de Villandry, with its 27,000 spring vegetables, is one of the stars of France's Loire Valley. For more than 20 years, it's been a UNESCO World Heritage site. The gardeners will soon need to plant the summer flowers: it's a race against the clock. Meanwhile, at the Château de Rivau, visitors can discover the beautiful scents of some 460 different varieties of roses. We also check out other charming gardens in the Touraine region, in Beaulieu-lès-Loches and in Chaumont-sur-Loire. An unforgettable sensory experience.