4 Madagascar

Madagascar is the world's fourth-largest island, endowed with some of the greatest biodiversity on the planet.

Visiting the country can serve as an educational opportunity for travelers who want to understand the devastating effects of global warming and irresponsible human actions.

Many tour providers already add eco-conscious elements to their itineraries, which focus on education, preservation and giving back to local communities.

Some experiences not to miss in Madagascar include swimming and snorkeling around Nosy Be, spotting lemurs in Ranomafana National Park, admiring the rocky landscapes of Isalo National Park and taking a sunset stroll along the Avenue of the Baobabs.