Sibebe Rock is the largest exposed granite dome in the world. It sits about 10 kilometers outside the capital city of Mbabane, and unlike its Australian cousin, Sibebe doesn’t suffer from tourist overcrowding. The rock’s sheer magnitude can be felt from the base, but many daring visitors choose to make the 4-hour round-trip hike to the top with a local guide. Sibebe Rock is number ten on our list because it’s over 3 billion years old!