A diver swimming between two tectonic plates, Iceland. The rift associated with the Mid-Atlantic Ridge, which marks the division between the European and North American tectonic plates, runs across Iceland from southwest to northeast.
Ice cave in the Skaftafell National Park in Iceland. Ice caves collapse and new ones form as each glacier grinds slowly towards the sea. Local guides can help you (without dying) find one. (Visit Skaftafell National Park in Iceland.
Photographing the Jaw-Dropping 'Crystal Caves' of Iceland