The Parco dei Mostri (Park of Monsters) of Bomarzo, a large park with gardens, buildings and fantastic sculptures, is a fun and different excursion, one that also inspired Salvador Dalì; meanwhile, the ancient village of Montecalvello develops around a castle where the famous Balthus, a contemporary painter, lived for thirty years. http://www.italia.it/en/discover-italy/lazio/viterbo.html

The botanical garden, directed by the University of Cagliari and streched for 5 hectares. Currently the garden contains some 2000 species, predominantly of Mediterranean origin but with a good collection of succulents and tropical plants as well. http://www.cagliariturismo.it/en/places/places-of-nature-318/green-areas-16/botanical-garden-83

The monumental Treves de'Bonfili Park, the first park to be designed in Padua, is a significant work designed by Giuseppe Jappelli. http://www.turismopadova.it/en/node/18107