A shack in the Outback, New South Wales, Australia

Animal skull, rocks and cracked dry earth, Outback, South Australia, Australia, Pacific

Primate skulls for sale in the market at Vogan, Togo, West Africa, Africa

Detail of a Crucifixion sculpture in Notre-Dame de Paris cathedral Treasure Museum, Paris, France, Europe

Stuffed baby llamas in Witches' Market, La Paz, Bolivia, South America

Stuffed baby llamas in Witches' Market, La Paz, Bolivia, South America

Christ sculpture in Notre-Dame de Paris cathedral Treasure Museum, Paris, France, Europe

Sculpted head stone at Mayan archeological site, Copan Ruins, UNESCO World Heritage Site, Honduras, Central America

Detail of a Crucifixion sculpture in Notre-Dame de Paris cathedral Treasure Museum, Paris, France, Europe

Injured juvenile yellow-footed gull (Larus livens), on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Sculpted head stone at Mayan archeological site, Copan Ruins, UNESCO World Heritage Site, Honduras, Central America

An Asmat man sleeping with his head resting on a skull in Papua New Guinea, Pacific

Inca cemetery, near Nazca, Peru, South America

Head of Grauballe Man, Iron Age bog mummy, Aarhus, Denmark, Scandinavia, Europe

House Tamberan of Angoram housing the Tambaran statue, on the Sepik River, photographed in 1974, only initiated warriors allowed inside on penalty of death, in the days of cannibalism, a victim's head from a neighbouring tribe was hung above the entrance to warn to those not properly initiated, Papua New Guinea, Pacific

Detail of St. Denis holding his head flanked by two angels, Virgin portal, Western facade, Notre Dame de Paris Cathedral, Paris, France, Europe

Victim of Vesuvius eruption, volcanic ash formed mould retaining human form later revealed by injecting plaster, Pompeii, UNESCO World Heritage Site, Campania, Italy, Europe

Mummy of Iron Age sacrificial victim, Tolland Man, Denmark, Scandinavia, Europe

Inca cemetery near Nazca, Peru, South America

Deaths-head hawkmoth (acherontia atropos) final instar larva or caterpillar, showing close-up of tail or horn

Deaths-head hawkmoth (acherontia atropos) larva or caterpillar, close-up of head showing mouthparts

Cambodia skulls of people murdered by the khmer rouge, at the killing fields national monument, pnom penh

Old graveyard, Marble Head, Ohio, United States of America, North America

Whalebone Alley, female tourist standing between bow head whale rib bones, Itygran Island (Bering Sea) Russia, Asia. MORE INFO: Whale Bone Alley was discovered by Soviet archaeologists in 1976, but has remained untouched since and little is known of this place. There is a long double line of bowhead whale bones -- jaws and ribs -- running parallel along the shore for hundreds of yards. Many of the bones, especially the enormous jaw bones, are still standing, propped up by lichen-covered rocks. The location is thought to have been used in about 1300 as a ceremonial site, for a men's secret society or feasting site.

Sperm whale (Physeter macrocephalus / catodon) washed up dead with man standing by head for scale. North coast of Iceland.

Women on sidewalk wearing skull face paint

Hispanic woman on sidewalk wearing skull face paint

Women leaning on loading dock wearing skull face paint

Hispanic woman standing on sidewalk wearing skull face paint

Hispanic woman near brick wall wearing skull face paint

Women near brick wall wearing skull face paint

Women in car wearing skull face paint

Women on sidewalk wearing skull face paint

Women on sidewalk wearing skull face paint

Hispanic woman wearing skull face paint

Mixed Race woman dancing on sidewalk wearing skull face paint

Hispanic woman driving car wearing skull face paint

Mixed Race woman on sidewalk wearing skull face paint texting on cell phone

Women on sidewalk corner wearing skull face paint

Mixed Race woman wearing scarf and skull face paint

Women on sidewalk wearing skull face paint

Women on sidewalk wearing skull face paint

Mixed Race woman on sidewalk wearing scarf and skull face paint

Mixed Race woman on sidewalk wearing skull face paint

Stone bust on the grave of Arnold Ritter von Zenetti, 1824-1891, chief municipal building officer, Alter Suedfriedhof, old cemetery in Munich, Bavaria, Germany

Stone bust on the grave of Arnold Ritter von Zenetti, 1824-1891, chief municipal building officer, Alter Suedfriedhof, old cemetery in Munich, Bavaria, Germany

Tzompantli, skull plattform, Maya and Toltek archeological site Chichen Itza, new worldwonder, Yucatan, Mexico

Deformed skulls, discovered in the Tihuanaku temples, Bolivia

Mummy from pre-colonial times, at the Tihuanaku UNESCO World Heritage Site, La Paz, Bolivia, South America

Grave site of the Erzgebirge poet and singer Anton Guenther, Gottesgab, Bozi Dar, Czech Republic, Europe

Stone bust on the grave of Dr. Justus Freiherr von Liebig, 1803-1873, chemist, Alter Suedfriedhof, old cemetery in Munich, Bavaria, Germany

Grave of Josef Hoechl, 1777-1838, municipal architect, Alter Suedfriedhof, old cemetery in Munich, Bavaria, Germany

Men of the ethnic group of the Bamileke with traditional masks, Dance of Death in honor of a deceased person, Badenkop, West Region, Cameroon, Africa

Painted skulls in the ossuary of Hallstatt, Salzkammergut, Upper Austria, Austria

Skull of a camel, Acacus Mountains or Tadrart Acacus range, Tassili n'Ajjer National Park, Unesco World Heritage Site, Algeria, Sahara, North Africa

Deformed skulls from the Tihuanaku Culture, UNESCO World Heritage, La Paz, Bolivia, South America

Loveparade 2010, huge crowds celebrate before many revellers are crushed to death in tragic tunnel accident, Duisburg, Ruhr Area, North Rhine-Westfalia, Germany, Europe

Jesus relief, La Recoleta Cemetery, Buenos Aires, Argentina, South America

Dried salmon head on gravel bank with fall foliage at the back, Big Salmon River, Yukon Territory, Canada

Inuvik, Northwest Territories, Canada; Cemetery In The Arctic At Sunset

La Milagrosa (The Miraculous One) In Necropolis Colon, Second Largest Cemetery In The World; Havana, Cuba

Capilla Central And Necropolis Colon, The Second Largest Cemetery In The World; Havana, Cuba

Necropolis Colon, Second Largest Cemetery In The World; Havana, Cuba

Mexico, Federal District, Mexico City, Portrait of Michacoa Aztec dancer in feather head-dress and painted face as Senor de Muerte or Mr Death performing in the Zocalo.