Historic Shot tower within glass dome, Melbourne Shopping Centre, Victoria, Australia (© Andrew Watson/Axiom/Aurora Photos) © (Bing Australia)

Historic Shot tower within glass dome, Melbourne Shopping Centre, Victoria, Australia (© Andrew Watson/Axiom/Aurora Photos) © (Bing Australia)

Western green tree frog leaping (© David A. Northcott/Corbis) © (Bing Australia)

Western green tree frog leaping (© David A. Northcott/Corbis) © (Bing Australia)

“Sweet Motion of the Northern Lights,” a multi-block sculpture at the 2007 World Ice Art Championship in Fairbanks, Alaska (© Patrick Endres/Getty Images) © (Bing Australia)

“Sweet Motion of the Northern Lights,” a multi-block sculpture at the 2007 World Ice Art Championship in Fairbanks, Alaska (© Patrick Endres/Getty Images) © (Bing Australia)

The National Theatre viewed through the gate to Chiang Kai-shek Memorial Hall, Taipei, Taiwan (© Danita Delimont/Gallo Images/Getty Images) © (Bing Australia)

The National Theatre viewed through the gate to Chiang Kai-shek Memorial Hall, Taipei, Taiwan (© Danita Delimont/Gallo Images/Getty Images) © (Bing Australia)

Grand Canyon National Park, Arizona (© Jean-Pierre Lescourret/SuperStock) © (Bing Australia)

Grand Canyon National Park, Arizona (© Jean-Pierre Lescourret/SuperStock) © (Bing Australia)

Dawn over jetty, Thomson Bay, Rottnest Island, Australia (© Andrew Watson / Axiom Photographic Agency) © (Bing Australia)

Dawn over jetty, Thomson Bay, Rottnest Island, Australia (© Andrew Watson / Axiom Photographic Agency) © (Bing Australia)

Florida manatee in the Crystal River, Florida (© Wayne Lynch/Corbis) © (Bing Australia)

Florida manatee in the Crystal River, Florida (© Wayne Lynch/Corbis) © (Bing Australia)

New River Gorge Bridge near Fayetteville, West Virginia (© Timothy Mainiero/age fotostock) © (Bing Australia)

New River Gorge Bridge near Fayetteville, West Virginia (© Timothy Mainiero/age fotostock) © (Bing Australia)

Palm frond (© Gary W. Carter/Corbis) © (Bing Australia)

Palm frond (© Gary W. Carter/Corbis) © (Bing Australia)

Jetty at Eucla, Western Australia (© Linda and Colin McKie/Photodisc/Getty Images) © (Bing Australia)

Jetty at Eucla, Western Australia (© Linda and Colin McKie/Photodisc/Getty Images) © (Bing Australia)

Mt. Warning-Wollumbin and Clarrie Hall Dam, Murwillumbah, Australia (© NatureScape/Footage Search) © (Bing Australia)

Mt. Warning-Wollumbin and Clarrie Hall Dam, Murwillumbah, Australia (© NatureScape/Footage Search) © (Bing Australia)

Talbot Lake in Athabasca River Valley, Jasper National Park, Alberta (© Tony Ernst) © (Bing Australia)

Talbot Lake in Athabasca River Valley, Jasper National Park, Alberta (© Tony Ernst) © (Bing Australia)

Red-crowned cranes (© DLILLC/Corbis) © (Bing Australia)

Red-crowned cranes (© DLILLC/Corbis) © (Bing Australia)

Halong Bay in Quang Ninh province, Vietnam (© Mark Daffey/Lonely Planet) © (Bing Australia)

Halong Bay in Quang Ninh province, Vietnam (© Mark Daffey/Lonely Planet) © (Bing Australia)

Japanese macaque monkeys in the Jigokudani Nature Reserve, Chubu, Japan (© Peter Adams Photography Ltd./Getty Images) © (Bing Australia)

Japanese macaque monkeys in the Jigokudani Nature Reserve, Chubu, Japan (© Peter Adams Photography Ltd./Getty Images) © (Bing Australia)

Aerial view of the coast along Lake Argentino, Glaciers National Park, Argentina (© Michele Molinari/Danita Delimont) © (Bing Australia)

Aerial view of the coast along Lake Argentino, Glaciers National Park, Argentina (© Michele Molinari/Danita Delimont) © (Bing Australia)

Dicentra (bleeding heart) plant (© Travel Ink/Gallo Images/Getty Images) © (Bing Australia)

Dicentra (bleeding heart) plant (© Travel Ink/Gallo Images/Getty Images) © (Bing Australia)

Aerial shot of a nursery garden with geometrically pruned trees near Leer, Germany (© Karl Johaentges/Getty Images) © (Bing Australia)

Aerial shot of a nursery garden with geometrically pruned trees near Leer, Germany (© Karl Johaentges/Getty Images) © (Bing Australia)

Pygmy sweepers in the Andaman Sea, off the coast of Thailand (© Georgie Holland/age footstock) © (Bing Australia)

Pygmy sweepers in the Andaman Sea, off the coast of Thailand (© Georgie Holland/age footstock) © (Bing Australia)

Gateshead Millennium “Winking Eye Bridge” in Newcastle, England (© Ian Cumming/Axiom) © (Bing Australia)

Gateshead Millennium “Winking Eye Bridge” in Newcastle, England (© Ian Cumming/Axiom) © (Bing Australia)

Storm clouds over the Chichester Range in the Pilbara region, Western Australia  (© Peter Walton Photography/Photolibrary/Getty Images) © (Bing Australia)

Storm clouds over the Chichester Range in the Pilbara region, Western Australia (© Peter Walton Photography/Photolibrary/Getty Images) © (Bing Australia)

Sunset over Santa Monica Beach, California (© Clipcanvas) © (Bing Australia)

Sunset over Santa Monica Beach, California (© Clipcanvas) © (Bing Australia)

Azure Kingfisher in the Yellow Water Wetlands, Kakadu National Park, Northern Territory (© Andrew Watson/Photolibrary/Getty Images) © (Bing Australia)

Azure Kingfisher in the Yellow Water Wetlands, Kakadu National Park, Northern Territory (© Andrew Watson/Photolibrary/Getty Images) © (Bing Australia)

Split Rock near Roswell, New Mexico (© John B. Carnett/Getty Images) © (Bing Australia)

Split Rock near Roswell, New Mexico (© John B. Carnett/Getty Images) © (Bing Australia)

Taipei 101 tower seen in the distance from a temple festooned with paper lanterns in Taipei, Taiwan (© Marc Dozier/Hemis/Corbis) © (Bing Australia)

Taipei 101 tower seen in the distance from a temple festooned with paper lanterns in Taipei, Taiwan (© Marc Dozier/Hemis/Corbis) © (Bing Australia)

Hippopotamus males fighting in Kruger National Park, South Africa (© Nigel Dennis/Gallo Images/Getty Images) © (Bing Australia)

Hippopotamus males fighting in Kruger National Park, South Africa (© Nigel Dennis/Gallo Images/Getty Images) © (Bing Australia)

Licmophora flabellata, a type of sessile diatom, at a magnification of 100 (© Wim van Egmond /Corbis) © (Bing Australia)

Licmophora flabellata, a type of sessile diatom, at a magnification of 100 (© Wim van Egmond /Corbis) © (Bing Australia)

Heads of stone statues at Mount Nemrut in eastern Turkey (© Manfred Mehlig/Corbis) © (Bing Australia)

Heads of stone statues at Mount Nemrut in eastern Turkey (© Manfred Mehlig/Corbis) © (Bing Australia)

One of the groundhogs at Brookfield Zoo in Brookfield, Illinois (© Tim Boyle /Getty Images) © (Bing Australia)

One of the groundhogs at Brookfield Zoo in Brookfield, Illinois (© Tim Boyle /Getty Images) © (Bing Australia)