Bryan and Cherry Alexander / Ice cap and crevassed glaciers near Cape York on the Northwest coast of Greenland, September 2008.
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Bryan and Cherry Alexander / Ice cap and glaciers near Cape York on the Northwest coast of Greenland, September 2008.
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Juergen Freund / Aerial view of island with steep limestone cliffs, birds' nests amongst the caves are highly protected or guarded for their commercial value in the Chinese market, Palawan, Philippines, May 2009.
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Bryan and Cherry Alexander / View down glacier from icecap to iceberg scattered sea. Cape York, Northwest Greenland, 1991.
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Bryan and Cherry Alexander / Glacier flowing down from the icecap in Sidebriksfjord, Northwest Greenland, 1996.
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Bryan and Cherry Alexander / Snout of Turnstone Glacier flowing from ice sheet. Ellesmere Island, Canada, 1994.
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Tim Laman / Aerial view of gorge of the Rio Ole, emerging from the Gran Caldera Volcanica de Luba, Bioko Island, Equatorial Guinea, Central Africa. January 2008
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Tim Laman / Aerial view of gorge of the Rio Ole, emerging from the Gran Caldera Volcanica de Luba, Bioko Island, Equatorial Guinea, Central Africa. January 2008
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Tim Laman / Aerial view of the Santa Cruz Islands, California. July 2002.
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Tim Laman / Aerial view of the Santa Cruz Islands, California. July 2002.
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Tim Laman / Aerial view of the Santa Cruz Islands, California. July 2002.
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Nigel Marven / Aerial view looking down into blue sulphuric / hydrochloric lake in volcanic crater, Kamchatka, Russia
