From the floral wonders of Britain's Sissinghurst Castle, to the garden palette of impressionist painter Monet, to the quirky individuality of two of Monty's most admired contemporary designers, he's forced to wonder why this part of the world is so rich in gardening glories, and how we can care for this massive horticultural heritage. Gardens: 65. UK - Rousham Park, Oxfordshire 66. UK - Sissinghurst Castle , Kent 67. France - Chateau Villandry , The Loire Valley 68. France - Claude Monet's Garden , Giverny 69. Belgium - Jacques Wirtz's Garden, Schoten, Antwerp 70. Netherlands - Het Loo Palace, Apeldoorn 71. Netherlands - The Boon Family Garden, Oostzaan, Amsterdam 72. Norway - The Arctic Alpine Botanic Gardens, Tromso