Aurora Borealis in Quebec, Canada

Aconcagua, Argentina

Cave of three bridges

Lightning flashes around the ash plume of the Puyehue-Cordon Caulle volcano chain near Entrelagos, Chile.

Kayaking in Glacier Bay, Alaska

The Sun peeks through over the Isle of Skye, Scotland

Ngoronggoro crater, Tanzania

Morning sun spilling into Forney Creek, at Great Smoky Mountains National Park, Tennessee

Ngarchelong, Palau

A thunderstorm over Crater Lake in Oregon

Garibaldi Lake, BC, Canada

Yushan National Park, Taiwan

Uluru at night