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

Sea angel

Stormy sky over Lake Geneva in Lausanne, Switzerland

Bridge of Sighs in Venice, Italy

Brocken spectre in Central Balkan National Park, Bulgaria

Orcus sculpture in the Gardens of Bomarzo in Bomarzo, Italy

Oil lamps arranged on a rangoli to celebrate Diwali in Guwahati, India

Mute swan in Valkenhorst Nature Reserve, near Valkenswaard, the Netherlands

Karst mountains in Guilin and Lijiang River National Park, China

Cypress trees in autumn, Georgia

Hoffmann's two-toed sloth mother and young, Puerto Viejo de Talamanca, Costa Rica