Arctic Whale Watching tour with a very good chance of spotting the great humpback whale, as well as white-beaked dolphins, minke whales, small harbour porpoises and sometimes even the majestic blue whale.
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.