At the University of Siena, you can visit the Botanical Gardens, founded in 1856 and once one of the many cultivated areas that existed within the city walls. Today, part of the garden preserves the plant species that were grown in the area, like exotic cactus plants, Tuscan ferns, fruit trees, beech trees, white firs and plants used for food, fodder and to make textiles. Maintenance of this area is part of a far-reaching landscaping plan started in 1964, while the garden’s “School” is a vast space home to geometrical flower beds, where students can research aromatic and medicinal plants. Don’t miss a trip to the greenhouse built in 1875, where you can view numerous exotic plants. And the best part? Admission is free!