What is the fine-grained topic of the following text: The bus ride from Cusco takes you through the fertile Sacred Valley, with its rushing river (white water rafting is popular with tourists here), its fields of corn, potatoes, quinoa, flowers and vegetables, and a series of small settlements and bigger towns, with most of the houses still made from local red earth bricks, with orange tiled roofs. Only return the topic.
Bus ride through the Sacred Valley from Cusco