Could "smokers" be the origin of life on Earth?
Vatnajökull National Park in Iceland
Indonesia: this is the largest highly acidic lake in the world
Yakushima's magical cedar forest
Sailing stones of Racetrack Playa, a mysterious phenomenon
Hvítserkur, a majestic dark monolith in Iceland
Japan's glowing Kochia Hill
Niue declared world's first 'Dark Sky nation'
Mysterious Great Blue Hole
The "water palace" was built in the 18th century by the raja of Jaipur state
The Chocolate Hills are a geological oddity
Katia Krafft is responsible for much of what we know about volcanoes