Sardinia is a rugged island off the Italian mainland that is dotted with forests and has miles of beautiful sandy beaches. It's also happens to be where you'll find the highest concentration of men over the age of 100 on the planet.
Sardinia was the first of five locations to be identified as a 'Blue Zone' where people live the longest by researchers Gianni Pes and Michel Poulain.
The locations are named Blue Zones after the blue circles the pair used to mark where the longest-living populations lived on a map, and which completely covered an area of Sardinia.
Author and explorer Dan Buettner identified four more Blue Zones and has been exploring the habits and lifestyles of people in all five locations for the past 20 years, and has a recently released Netflix series and book about his findings.