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An iceberg is a large piece of ice from freshwater that has broken off from a snow-formed glacier or ice shelf and is floating in open water. It may subsequently become frozen into pack ice. Alternatively, it may come to rest on the seabed in shallower water, causing ice scour (also known as ice gouging) or becoming an ice island...

Calbuco (kahl-boo-koh; Spanish: Volcán Calbuco) is a stratovolcano in southern Chile, located southeast of Llanquihue Lake and northwest of Chapo Lake, in the Los Lagos Region, and close to the cities of Puerto Varas and Puerto Montt. With an elevation of 2,015 meters above sea level, the volcano and the surrounding area are protected within the Llanquihue National Reserve. The most recent eruption happened on April 22, 2015, followed by two smaller eruptions on April 24 and April 30...

Kīlauea is an active volcano in the Hawaiian Islands, one of five shield volcanoes that together form the Island of Hawaiʻi. In Hawaiian, the word kīlauea means "spewing" or "much spreading", in reference to the mountain's frequent outpouring of lava. Lava has been continuously emitting at Puʻu ʻŌʻō since 3 January 1983 (over 27 years or 10000 days)...

Zhongdong (Chinese: 中洞; literally: "Middle Cave") is a village in Ziyun county, Anshun prefecture in Guizhou Province, People's Republic of China. It is thought to be the only inhabited, year-round settlement in China located inside a naturally occurring cave. The limestone Zhong Cave is the largest of three local caves, set between an upper and lower cave that are uninhabited. The cave, at 1800 meters above sea level, is only accessible on foot after over an hour's hike...

Kibera (Nubian: Forest or Jungle) is a division of Nairobi Area, Kenya, and neighbourhood of the city of Nairobi, 5 kilometres (3.1 mi) from the city centre. Kibera is the largest slum in Nairobi, and the largest urban slum in Africa. The 2009 Kenya Population and Housing Census reports Kibera's population as 170,070, contrary to previous estimates of one or two million people...

A bird's-eye view is an elevated view of an object from above, with a perspective as though the observer were a bird, often used in the making of blueprints, floor plans and maps. It can be an aerial photograph, but also a drawing. Before manned flight was common, the term "bird's eye" was used to distinguish views drawn from direct observation at high locations (for example a mountain or tower), from those constructed from an imagined (bird's) perspectives...

A greenhouse (also called a glasshouse) is a building in which plants are grown. These structures range in size from small sheds to very large buildings. A miniature greenhouse is known as a cold frame...