The porticoed façade of Grotta del Buontalenti gives you a taste of its interior decoration with fake stalactites, stones, and shells in a fantastic mix of nature and art. Inside you can admire the walls which are partly frescoed and partly covered with minerals that form figures of shepherds and animals. In the corners you can see reproductions of Michelangelo's Prisoners, while further on you'll find the Venus Fountain by Giambologna.