Quinta da Regaleira in Sintra. Portugal108Quinta da Regaleira in Sintra. PortugalMilkyway above Double Arch in Arches National Park. Utah108Milkyway above Double Arch in Arches National Park. UtahLava rock pools at the southern end of Lake Turkana in Kenya77Lava rock pools at the southern end of Lake Turkana in KenyaSuper moon eclipse over NY117Super moon eclipse over NYRare cave pearls at Son Doong Cave108Rare cave pearls at Son Doong CaveSilver fern frond108Silver fern frondCanals of Bruges. Belgium108Canals of Bruges. BelgiumNong Nooch Tropical Park. Thailand130Nong Nooch Tropical Park. ThailandThe Living Roof. California Academy of Sciences. Golden Gate Par70The Living Roof. California Academy of Sciences. Golden Gate ParPasture in Mânastirea Humorului. Bukovina. Romania126Pasture in Mânastirea Humorului. Bukovina. RomaniaLa Paz. Bolivia108La Paz. BoliviaFabra Observatory and Barcelona from the hills of Tibidabo. Spai108Fabra Observatory and Barcelona from the hills of Tibidabo. SpaiLargest solar flare128Largest solar flareSolar flares99Solar flaresLightening storm off Cooke Point. Port Hedland. Australia198Lightening storm off Cooke Point. Port Hedland. AustraliaPitcher plant140Pitcher plantVietnam-Ha-Long-Bay-Wallpaper110Vietnam-Ha-Long-Bay-WallpaperFoliage, including cottonwoods, willows, sage, and rabbitbrush,120Foliage, including cottonwoods, willows, sage, and rabbitbrush,Printing press letters150Printing press lettersField of flags displyed for Memorial Day. Boston. Mass.96Field of flags displyed for Memorial Day. Boston. Mass.