Dome sweet dome
Last light on Half Dome, Yosemite National Park, California (© Adam Burton/Alamy)

Dome sweet dome
Last light on Half Dome, Yosemite National Park, California (© Adam Burton/Alamy)

Wind River's wild dance
Wind River, Brooks Range, Arctic National Wildlife Refuge, Alaska (© Design Pics/Danita Delimont)

Wind River's wild dance
Wind River, Brooks Range, Arctic National Wildlife Refuge, Alaska (© Design Pics/Danita Delimont)

Grand gesture of love
Taj Mahal in Agra, Uttar Pradesh, India (© Tanarch/Getty Images)

Grand gesture of love
Taj Mahal in Agra, Uttar Pradesh, India (© Tanarch/Getty Images)

A blue moon
Jupiter's icy moon Europa (© NASA/JPL-Caltech/SETI Institute)

A blue moon
Jupiter's icy moon Europa (© NASA/JPL-Caltech/SETI Institute)

Follow the teacher!
African elephants in Tsavo East National Park, Kenya (© Neil Bowman/Minden Pictures)

Follow the teacher!
African elephants in Tsavo East National Park, Kenya (© Neil Bowman/Minden Pictures)

The stone town of Tuscany
Sorano, Tuscany, Italy (© Luigi Vaccarella/eStock Photo)

The stone town of Tuscany
Sorano, Tuscany, Italy (© Luigi Vaccarella/eStock Photo)

Celebrating architecture
The Elbphilharmonie concert hall in Hamburg, Germany (© Canetti/Shutterstock)

Celebrating architecture
The Elbphilharmonie concert hall in Hamburg, Germany (© Canetti/Shutterstock)

Ocean's eight
Mototi octopus, Lembeh Strait, Indonesia (© Howard Chew/Alamy)

Ocean's eight
Mototi octopus, Lembeh Strait, Indonesia (© Howard Chew/Alamy)

Colorado in full color
Aspens in the White River National Forest, Colorado (© Jason Hatfield/Tandem Stills + Motion)

Colorado in full color
Aspens in the White River National Forest, Colorado (© Jason Hatfield/Tandem Stills + Motion)

Rolling into fall
Kochia, Ibaraki prefecture, Japan (© DigiPub/Getty Images)

Rolling into fall
Kochia, Ibaraki prefecture, Japan (© DigiPub/Getty Images)

Celebrate the Celts
Cape Breton Highlands, Nova Scotia, Canada (© Cavan Images/Alamy)