One of Jupiter’s biggest moons has the potential to harbour life in a subsurface sea. The nature of its core will provide information about that ocean.
To visit Mauritania's Rainbow Mountains, you need to secure a visa in advance through a Mauritanian embassy. The best time to visit is between November and February when temperatures are cooler.
Whether sculpted by nature over millions of years or shaped by unique environmental conditions, these 30 unreal places in the world will leave you in awe.