Hubbard Glacier. This tidewater glacier may be a bit of a sleeping giant. Off the coast of Yakutat—200 miles NW of Juneau—Hubbard is certainly gigantic: it’s more than six miles wide where it meets the ocean. It’s also been very active in the past, having had two major surges in the past 30 years. Those surges were big enough to cross the bay, turning the fjord into a lake and threatening to flood the coastal town of Yakutat.

Santiago, Cuba