Aerial view of the Venice Skatepark in Venice Beach, Los Angeles

Asian elephants in West Bengal, India

US flag on part of a 9/11 memorial overlooking the New York skyline from Exchange Place, Jersey City, New Jersey

River Avon in Bath, England

San Juan Islands, Washington

Livraria Lello, a bookstore in Porto, Portugal

Humpback whales off the coast of Massachusetts

Park service employees inspecting Mount Rushmore National Memorial, South Dakota

The Regata Storica on the Grand Canal in Venice, Italy

Anna's hummingbird

The 'Alien Egg Hatchery' in the Bisti/De-Na-Zin Wilderness, New Mexico

Porto Flavia, Sardinia, Italy

A porcini mushroom

Đurđevića Tara Bridge in Montenegro

Crater glow from Mount Mayon in the Philippines

Underground lake in Ruskeala Mountain Park, Karelia, Russia

Red-billed oxpeckers on an impala in Mpumalanga, South Africa

Casa do Penedo (House of the Rock) in Portugal

A sea swallow feeding on the tentacles of a blue button in Coffs Harbour, New South Wales, Australia

Peekaboo view of Angels Window on the North Rim of the Grand Canyon, Arizona