Field of flags set up for Memorial Day (© Andrew Seegmiller/Getty Images)

Balsamroot and lupines, Methow Valley, North Cascades, Washington (© Alan Majchrowicz/Getty Images)

Aït Benhaddou, Morocco (© Grant Faint/Getty Images)

Añisclo Canyon, Ordesa y Monte Perdido National Park, Huesca, Spain (© Marisa Estivill/Shutterstock)

Indian star tortoise, Sri Lanka (© Robin Chittenden/Minden Pictures)

Tasmanian snow gum trees, Mount Field National Park, Tasmania, Australia (© Ignacio Palacios/Getty Images)

Cameron Highlands tea plantation, Malaysia (© alex cheong/Getty Images)

Bee tending a honeycomb (© Simun Ascic/Alamy)

Village of Vernazza, Cinque Terre, Liguria, Italy (© Roberto Moiola/Sysaworld/Getty Images)

Blue whale skeleton in the Natural History Museum, London, England (© Bailey-Cooper Photography/Alamy)