5. Mount Karthala
The largest active volcano in the world is Mount Karthala located on Grande Comore. It stands at just over 2300 metres and has consistently erupted every 11 years since the beginning of the 19th century. The last eruption was in 2005 and lasted 14 days! The volcano did quite a bit of damage in 2005, but the country has recovered nicely. You’ll love the bizarre yet spectacular landscape that the lava creates and it makes the hiking rather unique. You can climb to the volcano’s rim, but be warned, it’s a difficult two day trek.