Over a thousand species of cacti and succulents (native to the Southern United States, Central and South America and parts of Africa) set in a cliffside garden with views of Monaco and the Riviera. Made up of windy paths, bridges, vaults and viewpoints. Colourful and interesting throughout the year. Some of the specimens are huge. On the hour you can join a guided tour into the Observatory cave/grotto to see the limestone formations and there is also a small anthropology museum on site. Entry cost 7 Euros for an adult (April 2012).