The gates of the Royal Palace (Dar al-Makhzen) in Fez, Morocco

Bridge on the McKenzie River Trail, Willamette National Forest, Oregon

Cliff dwellings in Mesa Verde National Park, Colorado

North American river otters swimming in Acadia National Park, Maine

Ruins of the medieval castle of the Knights of St. John above the village of Chorio, Halki Island, Greece

The Punch Bowl on the River Quoich in the Cairngorms, Aberdeenshire, Scotland

Bald eagles near Haines, Alaska

The Vietnam Women's Memorial in Washington, DC

Rock formations in Badlands National Park during a lightning storm, South Dakota

European hedgehog in Sussex, England

Sky lanterns take flight during the Yi Peng Festival in Chiang Mai, Thailand

Lunar eclipse above Mount Crested Butte, Colorado

Runners in the 1990 New York City Marathon crossing the Verrazzano-Narrows Bridge

Tigh Mor Trossachs on Loch Achray, Scotland

Depiction of deities from the Tomb of Tutankhamun at the Egyptian Museum, Cairo, Egypt

Mount Kilimanjaro with Cape buffaloes in foreground, Amboseli Biosphere Reserve, Kenya

The Hughes H-4 Hercules, aka the Spruce Goose, November 1947, Long Beach Harbor, California

Skeleton figures (calacas) dressed up for Día de los Muertos celebrations in Mexico

Trees in Wychwood Forest near Chipping Norton, Oxfordshire, England

Polar bear at the edge of Hudson Bay, Manitoba, Canada